diff --git a/docs/userguide/wrapper/FAIRAttributes.ipynb b/docs/userguide/wrapper/FAIRAttributes.ipynb
index 0afa0df9..fa6c3c84 100644
--- a/docs/userguide/wrapper/FAIRAttributes.ipynb
+++ b/docs/userguide/wrapper/FAIRAttributes.ipynb
@@ -293,8 +293,8 @@
        "\n",
        "              <ul style=\"list-style-type: none;\" class=\"h5grp-sections\">\n",
        "                    <li>\n",
-       "                        <input id=\"group-ds--4934756700\" type=\"checkbox\" checked>\n",
-       "                        <label style=\"font-weight: bold\" for=\"group-ds--4934756700\">\n",
+       "                        <input id=\"group-ds--5844916500\" type=\"checkbox\" checked>\n",
+       "                        <label style=\"font-weight: bold\" for=\"group-ds--5844916500\">\n",
        "                        /<span>(2)</span></label>\n",
        "                  \n",
        "\n",
@@ -303,8 +303,8 @@
        "\n",
        "              <ul style=\"list-style-type: none;\" class=\"h5grp-sections\">\n",
        "                    <li>\n",
-       "                        <input id=\"group-ds-contact-4935177200\" type=\"checkbox\" checked>\n",
-       "                        <label style=\"font-weight: bold\" for=\"group-ds-contact-4935177200\">\n",
+       "                        <input id=\"group-ds-contact-5845226200\" type=\"checkbox\" checked>\n",
+       "                        <label style=\"font-weight: bold\" for=\"group-ds-contact-5845226200\">\n",
        "                        contact<a href=\"https://schema.org/author\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/author</span></a><a href=\"http://xmlns.com/foaf/0.1/Person\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">@type: http://xmlns.com/foaf/0.1/Person</span></a><span>(0)</span></label>\n",
        "                  \n",
        "\n",
@@ -315,12 +315,12 @@
        "\n",
        "              <ul style=\"list-style-type: none;\" class=\"h5grp-sections\">\n",
        "                    <li>\n",
-       "                        <input id=\"group-ds-h5rdmtoolbox-4935864800\" type=\"checkbox\" checked>\n",
-       "                        <label style=\"font-weight: bold\" for=\"group-ds-h5rdmtoolbox-4935864800\">\n",
+       "                        <input id=\"group-ds-h5rdmtoolbox-5845845400\" type=\"checkbox\" checked>\n",
+       "                        <label style=\"font-weight: bold\" for=\"group-ds-h5rdmtoolbox-5845845400\">\n",
        "                        h5rdmtoolbox<a href=\"https://schema.org/SoftwareSourceCode\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">@type: https://schema.org/SoftwareSourceCode</span></a><span>(0)</span></label>\n",
        "                  \n",
        "\n",
-       "                    <ul class=\"h5tb-attr-list\"><li style=\"list-style-type: none; font-style: italic\">__h5rdmtoolbox_version__<a href=\"https://schema.org/softwareVersion\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/softwareVersion</span></a> : 1.2.3a1</li><li style=\"list-style-type: none; font-style: italic\">codeRepository<a href=\"https://schema.org/codeRepository\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/codeRepository</span></a> : <a href=\"https://github.com/matthiasprobst/h5RDMtoolbox\">https://github.com/matthiasprobst/h5RDMtoolbox</a></li><li style=\"list-style-type: none; font-style: italic\">name<a href=\"https://schema.org/name\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/name</span></a> : h5rdmtoolbox</li>\n",
+       "                    <ul class=\"h5tb-attr-list\"><li style=\"list-style-type: none; font-style: italic\">__h5rdmtoolbox_version__<a href=\"https://schema.org/softwareVersion\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/softwareVersion</span></a> : 1.2.3a2</li><li style=\"list-style-type: none; font-style: italic\">codeRepository<a href=\"https://schema.org/codeRepository\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/codeRepository</span></a> : <a href=\"https://github.com/matthiasprobst/h5RDMtoolbox\">https://github.com/matthiasprobst/h5RDMtoolbox</a></li>\n",
        "                    </ul>\n",
        "</li>\n",
        "</ul>\n",
@@ -643,17 +643,17 @@
        "\n",
        "              <ul style=\"list-style-type: none;\" class=\"h5grp-sections\">\n",
        "                    <li>\n",
-       "                        <input id=\"group-ds--4991771600\" type=\"checkbox\" checked>\n",
-       "                        <label style=\"font-weight: bold\" for=\"group-ds--4991771600\">\n",
+       "                        <input id=\"group-ds--5898643600\" type=\"checkbox\" checked>\n",
+       "                        <label style=\"font-weight: bold\" for=\"group-ds--5898643600\">\n",
        "                        /<span>(3)</span></label>\n",
        "                  \n",
        "\n",
        "                    <ul class=\"h5tb-attr-list\">\n",
        "                    </ul>\n",
        "\n",
-       "                <ul id=\"ds-1-/random_velocity-4995227600\" class=\"h5tb-var-list\">\n",
-       "                    <input id=\"ds-2-/random_velocity-4995230700\" class=\"h5tb-varname-in\" type=\"checkbox\" checked>\n",
-       "                    <label class='h5tb-varname' for=\"ds-2-/random_velocity-4995230700\">random_velocity</label>\n",
+       "                <ul id=\"ds-1-/random_velocity-5900398700\" class=\"h5tb-var-list\">\n",
+       "                    <input id=\"ds-2-/random_velocity-5900401700\" class=\"h5tb-varname-in\" type=\"checkbox\" checked>\n",
+       "                    <label class='h5tb-varname' for=\"ds-2-/random_velocity-5900401700\">random_velocity</label>\n",
        "                    <span class=\"h5tb-dims\">(100) [float64]</span>\n",
        "                <ul class=\"h5tb-attr-list\"><li style=\"list-style-type: none; font-style: italic\">quantity_kind<a href=\"http://w3id.org/nfdi4ing/metadata4ing#hasKindOfQuantity\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">http://w3id.org/nfdi4ing/metadata4ing#hasKindOfQuantity</span></a> : velocity<a href=\"http://qudt.org/vocab/quantitykind/Velocity\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">http://qudt.org/vocab/quantitykind/Velocity</span></a></li><li style=\"list-style-type: none; font-style: italic\">units<a href=\"http://w3id.org/nfdi4ing/metadata4ing#hasUnit\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">http://w3id.org/nfdi4ing/metadata4ing#hasUnit</span></a> : m/s<a href=\"http://qudt.org/vocab/unit/M-PER-SEC\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">http://qudt.org/vocab/unit/M-PER-SEC</span></a></li>\n",
        "                </ul>\n",
@@ -661,8 +661,8 @@
        "\n",
        "              <ul style=\"list-style-type: none;\" class=\"h5grp-sections\">\n",
        "                    <li>\n",
-       "                        <input id=\"group-ds-contact-4995694400\" type=\"checkbox\" checked>\n",
-       "                        <label style=\"font-weight: bold\" for=\"group-ds-contact-4995694400\">\n",
+       "                        <input id=\"group-ds-contact-5900965600\" type=\"checkbox\" checked>\n",
+       "                        <label style=\"font-weight: bold\" for=\"group-ds-contact-5900965600\">\n",
        "                        contact<a href=\"https://schema.org/author\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/author</span></a><a href=\"http://xmlns.com/foaf/0.1/Person\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">@type: http://xmlns.com/foaf/0.1/Person</span></a><span>(0)</span></label>\n",
        "                  \n",
        "\n",
@@ -673,12 +673,12 @@
        "\n",
        "              <ul style=\"list-style-type: none;\" class=\"h5grp-sections\">\n",
        "                    <li>\n",
-       "                        <input id=\"group-ds-h5rdmtoolbox-4996139000\" type=\"checkbox\" checked>\n",
-       "                        <label style=\"font-weight: bold\" for=\"group-ds-h5rdmtoolbox-4996139000\">\n",
+       "                        <input id=\"group-ds-h5rdmtoolbox-5901624500\" type=\"checkbox\" checked>\n",
+       "                        <label style=\"font-weight: bold\" for=\"group-ds-h5rdmtoolbox-5901624500\">\n",
        "                        h5rdmtoolbox<a href=\"https://schema.org/SoftwareSourceCode\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">@type: https://schema.org/SoftwareSourceCode</span></a><span>(0)</span></label>\n",
        "                  \n",
        "\n",
-       "                    <ul class=\"h5tb-attr-list\"><li style=\"list-style-type: none; font-style: italic\">__h5rdmtoolbox_version__<a href=\"https://schema.org/softwareVersion\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/softwareVersion</span></a> : 1.2.3a1</li><li style=\"list-style-type: none; font-style: italic\">codeRepository<a href=\"https://schema.org/codeRepository\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/codeRepository</span></a> : <a href=\"https://github.com/matthiasprobst/h5RDMtoolbox\">https://github.com/matthiasprobst/h5RDMtoolbox</a></li><li style=\"list-style-type: none; font-style: italic\">name<a href=\"https://schema.org/name\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/name</span></a> : h5rdmtoolbox</li>\n",
+       "                    <ul class=\"h5tb-attr-list\"><li style=\"list-style-type: none; font-style: italic\">__h5rdmtoolbox_version__<a href=\"https://schema.org/softwareVersion\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/softwareVersion</span></a> : 1.2.3a2</li><li style=\"list-style-type: none; font-style: italic\">codeRepository<a href=\"https://schema.org/codeRepository\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/codeRepository</span></a> : <a href=\"https://github.com/matthiasprobst/h5RDMtoolbox\">https://github.com/matthiasprobst/h5RDMtoolbox</a></li>\n",
        "                    </ul>\n",
        "</li>\n",
        "</ul>\n",
@@ -970,17 +970,17 @@
        "\n",
        "              <ul style=\"list-style-type: none;\" class=\"h5grp-sections\">\n",
        "                    <li>\n",
-       "                        <input id=\"group-ds--5032734300\" type=\"checkbox\" checked>\n",
-       "                        <label style=\"font-weight: bold\" for=\"group-ds--5032734300\">\n",
+       "                        <input id=\"group-ds--5940808300\" type=\"checkbox\" checked>\n",
+       "                        <label style=\"font-weight: bold\" for=\"group-ds--5940808300\">\n",
        "                        /<span>(4)</span></label>\n",
        "                  \n",
        "\n",
        "                    <ul class=\"h5tb-attr-list\">\n",
        "                    </ul>\n",
        "\n",
-       "                <ul id=\"ds-1-/random_velocity-5034387100\" class=\"h5tb-var-list\">\n",
-       "                    <input id=\"ds-2-/random_velocity-5034390100\" class=\"h5tb-varname-in\" type=\"checkbox\" checked>\n",
-       "                    <label class='h5tb-varname' for=\"ds-2-/random_velocity-5034390100\">random_velocity</label>\n",
+       "                <ul id=\"ds-1-/random_velocity-5942209600\" class=\"h5tb-var-list\">\n",
+       "                    <input id=\"ds-2-/random_velocity-5942212600\" class=\"h5tb-varname-in\" type=\"checkbox\" checked>\n",
+       "                    <label class='h5tb-varname' for=\"ds-2-/random_velocity-5942212600\">random_velocity</label>\n",
        "                    <span class=\"h5tb-dims\">(100) [float64]</span>\n",
        "                <ul class=\"h5tb-attr-list\"><li style=\"list-style-type: none; font-style: italic\">quantity_kind<a href=\"http://w3id.org/nfdi4ing/metadata4ing#hasKindOfQuantity\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">http://w3id.org/nfdi4ing/metadata4ing#hasKindOfQuantity</span></a> : velocity<a href=\"http://qudt.org/vocab/quantitykind/Velocity\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">http://qudt.org/vocab/quantitykind/Velocity</span></a></li><li style=\"list-style-type: none; font-style: italic\">units<a href=\"http://w3id.org/nfdi4ing/metadata4ing#hasUnit\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">http://w3id.org/nfdi4ing/metadata4ing#hasUnit</span></a> : m/s<a href=\"http://qudt.org/vocab/unit/M-PER-SEC\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">http://qudt.org/vocab/unit/M-PER-SEC</span></a></li>\n",
        "                </ul>\n",
@@ -988,8 +988,8 @@
        "\n",
        "              <ul style=\"list-style-type: none;\" class=\"h5grp-sections\">\n",
        "                    <li>\n",
-       "                        <input id=\"group-ds-contact-5034776400\" type=\"checkbox\" checked>\n",
-       "                        <label style=\"font-weight: bold\" for=\"group-ds-contact-5034776400\">\n",
+       "                        <input id=\"group-ds-contact-5942643900\" type=\"checkbox\" checked>\n",
+       "                        <label style=\"font-weight: bold\" for=\"group-ds-contact-5942643900\">\n",
        "                        contact<a href=\"https://schema.org/author\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/author</span></a><a href=\"http://xmlns.com/foaf/0.1/Person\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">@type: http://xmlns.com/foaf/0.1/Person</span></a><span>(0)</span></label>\n",
        "                  \n",
        "\n",
@@ -1000,24 +1000,24 @@
        "\n",
        "              <ul style=\"list-style-type: none;\" class=\"h5grp-sections\">\n",
        "                    <li>\n",
-       "                        <input id=\"group-ds-h5rdmtoolbox-5035271600\" type=\"checkbox\" checked>\n",
-       "                        <label style=\"font-weight: bold\" for=\"group-ds-h5rdmtoolbox-5035271600\">\n",
+       "                        <input id=\"group-ds-h5rdmtoolbox-5943102900\" type=\"checkbox\" checked>\n",
+       "                        <label style=\"font-weight: bold\" for=\"group-ds-h5rdmtoolbox-5943102900\">\n",
        "                        h5rdmtoolbox<a href=\"https://schema.org/SoftwareSourceCode\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">@type: https://schema.org/SoftwareSourceCode</span></a><span>(0)</span></label>\n",
        "                  \n",
        "\n",
-       "                    <ul class=\"h5tb-attr-list\"><li style=\"list-style-type: none; font-style: italic\">__h5rdmtoolbox_version__<a href=\"https://schema.org/softwareVersion\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/softwareVersion</span></a> : 1.2.3a1</li><li style=\"list-style-type: none; font-style: italic\">codeRepository<a href=\"https://schema.org/codeRepository\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/codeRepository</span></a> : <a href=\"https://github.com/matthiasprobst/h5RDMtoolbox\">https://github.com/matthiasprobst/h5RDMtoolbox</a></li><li style=\"list-style-type: none; font-style: italic\">name<a href=\"https://schema.org/name\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/name</span></a> : h5rdmtoolbox</li>\n",
+       "                    <ul class=\"h5tb-attr-list\"><li style=\"list-style-type: none; font-style: italic\">__h5rdmtoolbox_version__<a href=\"https://schema.org/softwareVersion\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/softwareVersion</span></a> : 1.2.3a2</li><li style=\"list-style-type: none; font-style: italic\">codeRepository<a href=\"https://schema.org/codeRepository\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/codeRepository</span></a> : <a href=\"https://github.com/matthiasprobst/h5RDMtoolbox\">https://github.com/matthiasprobst/h5RDMtoolbox</a></li>\n",
        "                    </ul>\n",
        "</li>\n",
        "</ul>\n",
        "\n",
        "              <ul style=\"list-style-type: none;\" class=\"h5grp-sections\">\n",
        "                    <li>\n",
-       "                        <input id=\"group-ds-processing_info-5035829800\" type=\"checkbox\" checked>\n",
-       "                        <label style=\"font-weight: bold\" for=\"group-ds-processing_info-5035829800\">\n",
+       "                        <input id=\"group-ds-processing_info-5943535100\" type=\"checkbox\" checked>\n",
+       "                        <label style=\"font-weight: bold\" for=\"group-ds-processing_info-5943535100\">\n",
        "                        processing_info<a href=\"http://w3id.org/nfdi4ing/metadata4ing#ProcessingStep\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">@type: http://w3id.org/nfdi4ing/metadata4ing#ProcessingStep</span></a><span>(0)</span></label>\n",
        "                  \n",
        "\n",
-       "                    <ul class=\"h5tb-attr-list\"><li style=\"list-style-type: none; font-style: italic\">end_time<a href=\"https://schema.org/startTime\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/startTime</span></a> : 2024-03-23T17:46:47.934522</li><li style=\"list-style-type: none; font-style: italic\">has_participants<a href=\"http://purl.obolibrary.org/obo/RO_0000057\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">http://purl.obolibrary.org/obo/RO_0000057</span></a> : /contact</li><li style=\"list-style-type: none; font-style: italic\">output<a href=\"http://purl.obolibrary.org/obo/RO_0002234\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">http://purl.obolibrary.org/obo/RO_0002234</span></a> : /random_velocity</li><li style=\"list-style-type: none; font-style: italic\">start_time<a href=\"https://schema.org/startTime\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/startTime</span></a> : 2024-03-23T17:46:47.934522</li>\n",
+       "                    <ul class=\"h5tb-attr-list\"><li style=\"list-style-type: none; font-style: italic\">end_time<a href=\"https://schema.org/startTime\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/startTime</span></a> : 2024-03-25T21:42:05.541951</li><li style=\"list-style-type: none; font-style: italic\">has_participants<a href=\"http://purl.obolibrary.org/obo/RO_0000057\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">http://purl.obolibrary.org/obo/RO_0000057</span></a> : /contact</li><li style=\"list-style-type: none; font-style: italic\">output<a href=\"http://purl.obolibrary.org/obo/RO_0002234\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">http://purl.obolibrary.org/obo/RO_0002234</span></a> : /random_velocity</li><li style=\"list-style-type: none; font-style: italic\">start_time<a href=\"https://schema.org/startTime\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/startTime</span></a> : 2024-03-25T21:42:05.541951</li>\n",
        "                    </ul>\n",
        "</li>\n",
        "</ul>\n",
@@ -1289,17 +1289,17 @@
        "\n",
        "              <ul style=\"list-style-type: none;\" class=\"h5grp-sections\">\n",
        "                    <li>\n",
-       "                        <input id=\"group-ds--5048001300\" type=\"checkbox\" checked>\n",
-       "                        <label style=\"font-weight: bold\" for=\"group-ds--5048001300\">\n",
+       "                        <input id=\"group-ds--5956436300\" type=\"checkbox\" checked>\n",
+       "                        <label style=\"font-weight: bold\" for=\"group-ds--5956436300\">\n",
        "                        /<span>(4)</span></label>\n",
        "                  \n",
        "\n",
        "                    <ul class=\"h5tb-attr-list\">\n",
        "                    </ul>\n",
        "\n",
-       "                <ul id=\"ds-1-/random_velocity-5049467700\" class=\"h5tb-var-list\">\n",
-       "                    <input id=\"ds-2-/random_velocity-5049470900\" class=\"h5tb-varname-in\" type=\"checkbox\" checked>\n",
-       "                    <label class='h5tb-varname' for=\"ds-2-/random_velocity-5049470900\">random_velocity</label>\n",
+       "                <ul id=\"ds-1-/random_velocity-5957931200\" class=\"h5tb-var-list\">\n",
+       "                    <input id=\"ds-2-/random_velocity-5957934600\" class=\"h5tb-varname-in\" type=\"checkbox\" checked>\n",
+       "                    <label class='h5tb-varname' for=\"ds-2-/random_velocity-5957934600\">random_velocity</label>\n",
        "                    <span class=\"h5tb-dims\">(100) [float64]</span>\n",
        "                <ul class=\"h5tb-attr-list\"><li style=\"list-style-type: none; font-style: italic\">quantity_kind<a href=\"http://w3id.org/nfdi4ing/metadata4ing#hasKindOfQuantity\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">http://w3id.org/nfdi4ing/metadata4ing#hasKindOfQuantity</span></a> : velocity<a href=\"http://qudt.org/vocab/quantitykind/Velocity\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">http://qudt.org/vocab/quantitykind/Velocity</span></a></li><li style=\"list-style-type: none; font-style: italic\">units<a href=\"http://w3id.org/nfdi4ing/metadata4ing#hasUnit\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">http://w3id.org/nfdi4ing/metadata4ing#hasUnit</span></a> : m/s<a href=\"http://qudt.org/vocab/unit/M-PER-SEC\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">http://qudt.org/vocab/unit/M-PER-SEC</span></a></li>\n",
        "                </ul>\n",
@@ -1307,8 +1307,8 @@
        "\n",
        "              <ul style=\"list-style-type: none;\" class=\"h5grp-sections\">\n",
        "                    <li>\n",
-       "                        <input id=\"group-ds-contact-5049828200\" type=\"checkbox\" checked>\n",
-       "                        <label style=\"font-weight: bold\" for=\"group-ds-contact-5049828200\">\n",
+       "                        <input id=\"group-ds-contact-5958315000\" type=\"checkbox\" checked>\n",
+       "                        <label style=\"font-weight: bold\" for=\"group-ds-contact-5958315000\">\n",
        "                        contact<a href=\"https://schema.org/author\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/author</span></a><a href=\"http://xmlns.com/foaf/0.1/Person\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">@type: http://xmlns.com/foaf/0.1/Person</span></a><span>(0)</span></label>\n",
        "                  \n",
        "\n",
@@ -1319,24 +1319,24 @@
        "\n",
        "              <ul style=\"list-style-type: none;\" class=\"h5grp-sections\">\n",
        "                    <li>\n",
-       "                        <input id=\"group-ds-h5rdmtoolbox-5050216200\" type=\"checkbox\" checked>\n",
-       "                        <label style=\"font-weight: bold\" for=\"group-ds-h5rdmtoolbox-5050216200\">\n",
+       "                        <input id=\"group-ds-h5rdmtoolbox-5958719600\" type=\"checkbox\" checked>\n",
+       "                        <label style=\"font-weight: bold\" for=\"group-ds-h5rdmtoolbox-5958719600\">\n",
        "                        h5rdmtoolbox<a href=\"https://schema.org/SoftwareSourceCode\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">@type: https://schema.org/SoftwareSourceCode</span></a><span>(0)</span></label>\n",
        "                  \n",
        "\n",
-       "                    <ul class=\"h5tb-attr-list\"><li style=\"list-style-type: none; font-style: italic\">__h5rdmtoolbox_version__<a href=\"https://schema.org/softwareVersion\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/softwareVersion</span></a> : 1.2.3a1</li><li style=\"list-style-type: none; font-style: italic\">codeRepository<a href=\"https://schema.org/codeRepository\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/codeRepository</span></a> : <a href=\"https://github.com/matthiasprobst/h5RDMtoolbox\">https://github.com/matthiasprobst/h5RDMtoolbox</a></li><li style=\"list-style-type: none; font-style: italic\">name<a href=\"https://schema.org/name\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/name</span></a> : h5rdmtoolbox</li>\n",
+       "                    <ul class=\"h5tb-attr-list\"><li style=\"list-style-type: none; font-style: italic\">__h5rdmtoolbox_version__<a href=\"https://schema.org/softwareVersion\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/softwareVersion</span></a> : 1.2.3a2</li><li style=\"list-style-type: none; font-style: italic\">codeRepository<a href=\"https://schema.org/codeRepository\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/codeRepository</span></a> : <a href=\"https://github.com/matthiasprobst/h5RDMtoolbox\">https://github.com/matthiasprobst/h5RDMtoolbox</a></li>\n",
        "                    </ul>\n",
        "</li>\n",
        "</ul>\n",
        "\n",
        "              <ul style=\"list-style-type: none;\" class=\"h5grp-sections\">\n",
        "                    <li>\n",
-       "                        <input id=\"group-ds-processing_info-5050686500\" type=\"checkbox\" checked>\n",
-       "                        <label style=\"font-weight: bold\" for=\"group-ds-processing_info-5050686500\">\n",
+       "                        <input id=\"group-ds-processing_info-5959087100\" type=\"checkbox\" checked>\n",
+       "                        <label style=\"font-weight: bold\" for=\"group-ds-processing_info-5959087100\">\n",
        "                        processing_info<a href=\"http://w3id.org/nfdi4ing/metadata4ing#ProcessingStep\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">@type: http://w3id.org/nfdi4ing/metadata4ing#ProcessingStep</span></a><span>(0)</span></label>\n",
        "                  \n",
        "\n",
-       "                    <ul class=\"h5tb-attr-list\"><li style=\"list-style-type: none; font-style: italic\">end_time<a href=\"https://schema.org/startTime\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/startTime</span></a> : 2024-03-23T17:46:47.934522</li><li style=\"list-style-type: none; font-style: italic\">has_participants<a href=\"http://purl.obolibrary.org/obo/RO_0000057\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">http://purl.obolibrary.org/obo/RO_0000057</span></a> : /contact</li><li style=\"list-style-type: none; font-style: italic\">output<a href=\"http://purl.obolibrary.org/obo/RO_0002234\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">http://purl.obolibrary.org/obo/RO_0002234</span></a> : /random_velocity</li><li style=\"list-style-type: none; font-style: italic\">start_time<a href=\"https://schema.org/startTime\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/startTime</span></a> : 2024-03-23T17:46:47.934522</li>\n",
+       "                    <ul class=\"h5tb-attr-list\"><li style=\"list-style-type: none; font-style: italic\">end_time<a href=\"https://schema.org/startTime\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/startTime</span></a> : 2024-03-25T21:42:05.541951</li><li style=\"list-style-type: none; font-style: italic\">has_participants<a href=\"http://purl.obolibrary.org/obo/RO_0000057\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">http://purl.obolibrary.org/obo/RO_0000057</span></a> : /contact</li><li style=\"list-style-type: none; font-style: italic\">output<a href=\"http://purl.obolibrary.org/obo/RO_0002234\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">http://purl.obolibrary.org/obo/RO_0002234</span></a> : /random_velocity</li><li style=\"list-style-type: none; font-style: italic\">start_time<a href=\"https://schema.org/startTime\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">https://schema.org/startTime</span></a> : 2024-03-25T21:42:05.541951</li>\n",
        "                    </ul>\n",
        "</li>\n",
        "</ul>\n",
@@ -1383,35 +1383,190 @@
    "metadata": {},
    "outputs": [
     {
-     "ename": "TypeError",
-     "evalue": "Object of type Group is not JSON serializable",
-     "output_type": "error",
-     "traceback": [
-      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
-      "\u001b[1;31mTypeError\u001b[0m                                 Traceback (most recent call last)",
-      "Cell \u001b[1;32mIn[10], line 2\u001b[0m\n\u001b[0;32m      1\u001b[0m \u001b[38;5;28mprint\u001b[39m(\n\u001b[1;32m----> 2\u001b[0m     \u001b[43mjsonld\u001b[49m\u001b[38;5;241;43m.\u001b[39;49m\u001b[43mh5dumps\u001b[49m\u001b[43m(\u001b[49m\n\u001b[0;32m      3\u001b[0m \u001b[43m        \u001b[49m\u001b[43mhdf_filename\u001b[49m\u001b[43m,\u001b[49m\n\u001b[0;32m      4\u001b[0m \u001b[43m        \u001b[49m\u001b[43mindent\u001b[49m\u001b[38;5;241;43m=\u001b[39;49m\u001b[38;5;241;43m2\u001b[39;49m\u001b[43m,\u001b[49m\n\u001b[0;32m      5\u001b[0m \u001b[43m        \u001b[49m\u001b[43mcontext\u001b[49m\u001b[38;5;241;43m=\u001b[39;49m\u001b[43m{\u001b[49m\u001b[38;5;124;43m'\u001b[39;49m\u001b[38;5;124;43mm4i\u001b[39;49m\u001b[38;5;124;43m'\u001b[39;49m\u001b[43m:\u001b[49m\u001b[43m \u001b[49m\u001b[38;5;124;43m'\u001b[39;49m\u001b[38;5;124;43mhttp://w3id.org/nfdi4ing/metadata4ing#\u001b[39;49m\u001b[38;5;124;43m'\u001b[39;49m\u001b[43m,\u001b[49m\n\u001b[0;32m      6\u001b[0m \u001b[43m                 \u001b[49m\u001b[38;5;124;43m'\u001b[39;49m\u001b[38;5;124;43mfoaf\u001b[39;49m\u001b[38;5;124;43m'\u001b[39;49m\u001b[43m:\u001b[49m\u001b[43m \u001b[49m\u001b[38;5;124;43m'\u001b[39;49m\u001b[38;5;124;43mhttp://xmlns.com/foaf/0.1/\u001b[39;49m\u001b[38;5;124;43m'\u001b[39;49m\u001b[43m}\u001b[49m\n\u001b[0;32m      7\u001b[0m \u001b[43m    \u001b[49m\u001b[43m)\u001b[49m\n\u001b[0;32m      8\u001b[0m )\n",
-      "File \u001b[1;32m~\\Documents\\programming\\GitHub\\h5RDMtoolbox\\h5rdmtoolbox\\wrapper\\jsonld.py:402\u001b[0m, in \u001b[0;36mdumps\u001b[1;34m(grp, iri_only, local, recursive, compact, context, **kwargs)\u001b[0m\n\u001b[0;32m    394\u001b[0m \u001b[38;5;28;01mdef\u001b[39;00m \u001b[38;5;21mdumps\u001b[39m(grp,\n\u001b[0;32m    395\u001b[0m           iri_only\u001b[38;5;241m=\u001b[39m\u001b[38;5;28;01mFalse\u001b[39;00m,\n\u001b[0;32m    396\u001b[0m           local\u001b[38;5;241m=\u001b[39m\u001b[38;5;28;01mNone\u001b[39;00m,\n\u001b[1;32m   (...)\u001b[0m\n\u001b[0;32m    399\u001b[0m           context: Optional[Dict] \u001b[38;5;241m=\u001b[39m \u001b[38;5;28;01mNone\u001b[39;00m,\n\u001b[0;32m    400\u001b[0m           \u001b[38;5;241m*\u001b[39m\u001b[38;5;241m*\u001b[39mkwargs) \u001b[38;5;241m-\u001b[39m\u001b[38;5;241m>\u001b[39m \u001b[38;5;28mstr\u001b[39m:\n\u001b[0;32m    401\u001b[0m \u001b[38;5;250m    \u001b[39m\u001b[38;5;124;03m\"\"\"Dump a group or a dataset to to string.\"\"\"\u001b[39;00m\n\u001b[1;32m--> 402\u001b[0m     \u001b[38;5;28;01mreturn\u001b[39;00m json\u001b[38;5;241m.\u001b[39mdumps(\u001b[43mdumpd\u001b[49m\u001b[43m(\u001b[49m\n\u001b[0;32m    403\u001b[0m \u001b[43m        \u001b[49m\u001b[43mgrp\u001b[49m\u001b[38;5;241;43m=\u001b[39;49m\u001b[43mgrp\u001b[49m\u001b[43m,\u001b[49m\n\u001b[0;32m    404\u001b[0m \u001b[43m        \u001b[49m\u001b[43miri_only\u001b[49m\u001b[38;5;241;43m=\u001b[39;49m\u001b[43miri_only\u001b[49m\u001b[43m,\u001b[49m\n\u001b[0;32m    405\u001b[0m \u001b[43m        \u001b[49m\u001b[43mlocal\u001b[49m\u001b[38;5;241;43m=\u001b[39;49m\u001b[43mlocal\u001b[49m\u001b[43m,\u001b[49m\n\u001b[0;32m    406\u001b[0m \u001b[43m        \u001b[49m\u001b[43mrecursive\u001b[49m\u001b[38;5;241;43m=\u001b[39;49m\u001b[43mrecursive\u001b[49m\u001b[43m,\u001b[49m\n\u001b[0;32m    407\u001b[0m \u001b[43m        \u001b[49m\u001b[43mcompact\u001b[49m\u001b[38;5;241;43m=\u001b[39;49m\u001b[43mcompact\u001b[49m\u001b[43m,\u001b[49m\n\u001b[0;32m    408\u001b[0m \u001b[43m        \u001b[49m\u001b[43mcontext\u001b[49m\u001b[38;5;241;43m=\u001b[39;49m\u001b[43mcontext\u001b[49m\u001b[43m)\u001b[49m,\n\u001b[0;32m    409\u001b[0m         \u001b[38;5;241m*\u001b[39m\u001b[38;5;241m*\u001b[39mkwargs\n\u001b[0;32m    410\u001b[0m     )\n",
-      "File \u001b[1;32m~\\Documents\\programming\\GitHub\\h5RDMtoolbox\\h5rdmtoolbox\\wrapper\\jsonld.py:385\u001b[0m, in \u001b[0;36mdumpd\u001b[1;34m(grp, iri_only, local, recursive, compact, context)\u001b[0m\n\u001b[0;32m    377\u001b[0m \u001b[38;5;28;01mdef\u001b[39;00m \u001b[38;5;21mdumpd\u001b[39m(grp,\n\u001b[0;32m    378\u001b[0m           iri_only\u001b[38;5;241m=\u001b[39m\u001b[38;5;28;01mFalse\u001b[39;00m,\n\u001b[0;32m    379\u001b[0m           local\u001b[38;5;241m=\u001b[39m\u001b[38;5;28;01mNone\u001b[39;00m,\n\u001b[1;32m   (...)\u001b[0m\n\u001b[0;32m    382\u001b[0m           context: Dict \u001b[38;5;241m=\u001b[39m \u001b[38;5;28;01mNone\u001b[39;00m\n\u001b[0;32m    383\u001b[0m           ) \u001b[38;5;241m-\u001b[39m\u001b[38;5;241m>\u001b[39m Union[List, Dict]:\n\u001b[0;32m    384\u001b[0m \u001b[38;5;250m    \u001b[39m\u001b[38;5;124;03m\"\"\"If context is missing, return will be a List\"\"\"\u001b[39;00m\n\u001b[1;32m--> 385\u001b[0m     s \u001b[38;5;241m=\u001b[39m \u001b[43mserialize\u001b[49m\u001b[43m(\u001b[49m\u001b[43mgrp\u001b[49m\u001b[43m,\u001b[49m\n\u001b[0;32m    386\u001b[0m \u001b[43m                  \u001b[49m\u001b[43miri_only\u001b[49m\u001b[43m,\u001b[49m\n\u001b[0;32m    387\u001b[0m \u001b[43m                  \u001b[49m\u001b[43mlocal\u001b[49m\u001b[43m,\u001b[49m\n\u001b[0;32m    388\u001b[0m \u001b[43m                  \u001b[49m\u001b[43mrecursive\u001b[49m\u001b[38;5;241;43m=\u001b[39;49m\u001b[43mrecursive\u001b[49m\u001b[43m,\u001b[49m\n\u001b[0;32m    389\u001b[0m \u001b[43m                  \u001b[49m\u001b[43mcompact\u001b[49m\u001b[38;5;241;43m=\u001b[39;49m\u001b[43mcompact\u001b[49m\u001b[43m,\u001b[49m\n\u001b[0;32m    390\u001b[0m \u001b[43m                  \u001b[49m\u001b[43mcontext\u001b[49m\u001b[38;5;241;43m=\u001b[39;49m\u001b[43mcontext\u001b[49m\u001b[43m)\u001b[49m\n\u001b[0;32m    391\u001b[0m     \u001b[38;5;28;01mreturn\u001b[39;00m json\u001b[38;5;241m.\u001b[39mloads(s)\n",
-      "File \u001b[1;32m~\\Documents\\programming\\GitHub\\h5RDMtoolbox\\h5rdmtoolbox\\wrapper\\jsonld.py:258\u001b[0m, in \u001b[0;36mserialize\u001b[1;34m(grp, iri_only, local, recursive, compact, context)\u001b[0m\n\u001b[0;32m    256\u001b[0m     \u001b[38;5;28;01mfrom\u001b[39;00m \u001b[38;5;21;01m.\u001b[39;00m\u001b[38;5;21;01mcore\u001b[39;00m \u001b[38;5;28;01mimport\u001b[39;00m File\n\u001b[0;32m    257\u001b[0m     \u001b[38;5;28;01mwith\u001b[39;00m File(grp) \u001b[38;5;28;01mas\u001b[39;00m h5:\n\u001b[1;32m--> 258\u001b[0m         \u001b[38;5;28;01mreturn\u001b[39;00m \u001b[43mserialize\u001b[49m\u001b[43m(\u001b[49m\u001b[43mh5\u001b[49m\u001b[43m,\u001b[49m\n\u001b[0;32m    259\u001b[0m \u001b[43m                         \u001b[49m\u001b[43miri_only\u001b[49m\u001b[43m,\u001b[49m\n\u001b[0;32m    260\u001b[0m \u001b[43m                         \u001b[49m\u001b[43mlocal\u001b[49m\u001b[43m,\u001b[49m\n\u001b[0;32m    261\u001b[0m \u001b[43m                         \u001b[49m\u001b[43mrecursive\u001b[49m\u001b[38;5;241;43m=\u001b[39;49m\u001b[43mrecursive\u001b[49m\u001b[43m,\u001b[49m\n\u001b[0;32m    262\u001b[0m \u001b[43m                         \u001b[49m\u001b[43mcompact\u001b[49m\u001b[38;5;241;43m=\u001b[39;49m\u001b[43mcompact\u001b[49m\u001b[43m,\u001b[49m\n\u001b[0;32m    263\u001b[0m \u001b[43m                         \u001b[49m\u001b[43mcontext\u001b[49m\u001b[38;5;241;43m=\u001b[39;49m\u001b[43mcontext\u001b[49m\u001b[43m)\u001b[49m\n\u001b[0;32m    264\u001b[0m \u001b[38;5;66;03m# global _context\u001b[39;00m\n\u001b[0;32m    265\u001b[0m _context \u001b[38;5;241m=\u001b[39m {}\n",
-      "File \u001b[1;32m~\\Documents\\programming\\GitHub\\h5RDMtoolbox\\h5rdmtoolbox\\wrapper\\jsonld.py:368\u001b[0m, in \u001b[0;36mserialize\u001b[1;34m(grp, iri_only, local, recursive, compact, context)\u001b[0m\n\u001b[0;32m    365\u001b[0m _add_hdf_node(grp\u001b[38;5;241m.\u001b[39mname, grp)\n\u001b[0;32m    367\u001b[0m \u001b[38;5;28;01mif\u001b[39;00m recursive:\n\u001b[1;32m--> 368\u001b[0m     \u001b[43mgrp\u001b[49m\u001b[38;5;241;43m.\u001b[39;49m\u001b[43mvisititems\u001b[49m\u001b[43m(\u001b[49m\u001b[43m_add_hdf_node\u001b[49m\u001b[43m)\u001b[49m\n\u001b[0;32m    370\u001b[0m \u001b[38;5;28;01mreturn\u001b[39;00m g\u001b[38;5;241m.\u001b[39mserialize(\n\u001b[0;32m    371\u001b[0m     \u001b[38;5;28mformat\u001b[39m\u001b[38;5;241m=\u001b[39m\u001b[38;5;124m'\u001b[39m\u001b[38;5;124mjson-ld\u001b[39m\u001b[38;5;124m'\u001b[39m,\n\u001b[0;32m    372\u001b[0m     context\u001b[38;5;241m=\u001b[39m_context,\n\u001b[0;32m    373\u001b[0m     compact\u001b[38;5;241m=\u001b[39mcompact\n\u001b[0;32m    374\u001b[0m )\n",
-      "File \u001b[1;32m~\\Anaconda3\\envs\\h5tbx\\lib\\site-packages\\h5py\\_hl\\group.py:668\u001b[0m, in \u001b[0;36mGroup.visititems\u001b[1;34m(self, func)\u001b[0m\n\u001b[0;32m    666\u001b[0m     name \u001b[38;5;241m=\u001b[39m \u001b[38;5;28mself\u001b[39m\u001b[38;5;241m.\u001b[39m_d(name)\n\u001b[0;32m    667\u001b[0m     \u001b[38;5;28;01mreturn\u001b[39;00m func(name, \u001b[38;5;28mself\u001b[39m[name])\n\u001b[1;32m--> 668\u001b[0m \u001b[38;5;28;01mreturn\u001b[39;00m \u001b[43mh5o\u001b[49m\u001b[38;5;241;43m.\u001b[39;49m\u001b[43mvisit\u001b[49m\u001b[43m(\u001b[49m\u001b[38;5;28;43mself\u001b[39;49m\u001b[38;5;241;43m.\u001b[39;49m\u001b[43mid\u001b[49m\u001b[43m,\u001b[49m\u001b[43m \u001b[49m\u001b[43mproxy\u001b[49m\u001b[43m)\u001b[49m\n",
-      "File \u001b[1;32mh5py\\_objects.pyx:54\u001b[0m, in \u001b[0;36mh5py._objects.with_phil.wrapper\u001b[1;34m()\u001b[0m\n",
-      "File \u001b[1;32mh5py\\_objects.pyx:55\u001b[0m, in \u001b[0;36mh5py._objects.with_phil.wrapper\u001b[1;34m()\u001b[0m\n",
-      "File \u001b[1;32mh5py\\h5o.pyx:354\u001b[0m, in \u001b[0;36mh5py.h5o.visit\u001b[1;34m()\u001b[0m\n",
-      "File \u001b[1;32mh5py\\h5o.pyx:301\u001b[0m, in \u001b[0;36mh5py.h5o.cb_obj_simple\u001b[1;34m()\u001b[0m\n",
-      "File \u001b[1;32m~\\Anaconda3\\envs\\h5tbx\\lib\\site-packages\\h5py\\_hl\\group.py:667\u001b[0m, in \u001b[0;36mGroup.visititems.<locals>.proxy\u001b[1;34m(name)\u001b[0m\n\u001b[0;32m    665\u001b[0m \u001b[38;5;250m\u001b[39m\u001b[38;5;124;03m\"\"\" Use the text name of the object, not bytes \"\"\"\u001b[39;00m\n\u001b[0;32m    666\u001b[0m name \u001b[38;5;241m=\u001b[39m \u001b[38;5;28mself\u001b[39m\u001b[38;5;241m.\u001b[39m_d(name)\n\u001b[1;32m--> 667\u001b[0m \u001b[38;5;28;01mreturn\u001b[39;00m \u001b[43mfunc\u001b[49m\u001b[43m(\u001b[49m\u001b[43mname\u001b[49m\u001b[43m,\u001b[49m\u001b[43m \u001b[49m\u001b[38;5;28;43mself\u001b[39;49m\u001b[43m[\u001b[49m\u001b[43mname\u001b[49m\u001b[43m]\u001b[49m\u001b[43m)\u001b[49m\n",
-      "File \u001b[1;32m~\\Documents\\programming\\GitHub\\h5RDMtoolbox\\h5rdmtoolbox\\wrapper\\jsonld.py:330\u001b[0m, in \u001b[0;36mserialize.<locals>._add_hdf_node\u001b[1;34m(name, obj)\u001b[0m\n\u001b[0;32m    328\u001b[0m         attr_literal \u001b[38;5;241m=\u001b[39m rdflib\u001b[38;5;241m.\u001b[39mLiteral(json\u001b[38;5;241m.\u001b[39mdumps(av\u001b[38;5;241m.\u001b[39mtolist()))\n\u001b[0;32m    329\u001b[0m     \u001b[38;5;28;01melse\u001b[39;00m:\n\u001b[1;32m--> 330\u001b[0m         attr_literal \u001b[38;5;241m=\u001b[39m rdflib\u001b[38;5;241m.\u001b[39mLiteral(\u001b[43mjson\u001b[49m\u001b[38;5;241;43m.\u001b[39;49m\u001b[43mdumps\u001b[49m\u001b[43m(\u001b[49m\u001b[43mav\u001b[49m\u001b[43m)\u001b[49m)\n\u001b[0;32m    331\u001b[0m \u001b[38;5;66;03m# add node for attr value\u001b[39;00m\n\u001b[0;32m    332\u001b[0m \u001b[38;5;28;01mif\u001b[39;00m attr_literal:\n",
-      "File \u001b[1;32m~\\Anaconda3\\envs\\h5tbx\\lib\\json\\__init__.py:231\u001b[0m, in \u001b[0;36mdumps\u001b[1;34m(obj, skipkeys, ensure_ascii, check_circular, allow_nan, cls, indent, separators, default, sort_keys, **kw)\u001b[0m\n\u001b[0;32m    226\u001b[0m \u001b[38;5;66;03m# cached encoder\u001b[39;00m\n\u001b[0;32m    227\u001b[0m \u001b[38;5;28;01mif\u001b[39;00m (\u001b[38;5;129;01mnot\u001b[39;00m skipkeys \u001b[38;5;129;01mand\u001b[39;00m ensure_ascii \u001b[38;5;129;01mand\u001b[39;00m\n\u001b[0;32m    228\u001b[0m     check_circular \u001b[38;5;129;01mand\u001b[39;00m allow_nan \u001b[38;5;129;01mand\u001b[39;00m\n\u001b[0;32m    229\u001b[0m     \u001b[38;5;28mcls\u001b[39m \u001b[38;5;129;01mis\u001b[39;00m \u001b[38;5;28;01mNone\u001b[39;00m \u001b[38;5;129;01mand\u001b[39;00m indent \u001b[38;5;129;01mis\u001b[39;00m \u001b[38;5;28;01mNone\u001b[39;00m \u001b[38;5;129;01mand\u001b[39;00m separators \u001b[38;5;129;01mis\u001b[39;00m \u001b[38;5;28;01mNone\u001b[39;00m \u001b[38;5;129;01mand\u001b[39;00m\n\u001b[0;32m    230\u001b[0m     default \u001b[38;5;129;01mis\u001b[39;00m \u001b[38;5;28;01mNone\u001b[39;00m \u001b[38;5;129;01mand\u001b[39;00m \u001b[38;5;129;01mnot\u001b[39;00m sort_keys \u001b[38;5;129;01mand\u001b[39;00m \u001b[38;5;129;01mnot\u001b[39;00m kw):\n\u001b[1;32m--> 231\u001b[0m     \u001b[38;5;28;01mreturn\u001b[39;00m \u001b[43m_default_encoder\u001b[49m\u001b[38;5;241;43m.\u001b[39;49m\u001b[43mencode\u001b[49m\u001b[43m(\u001b[49m\u001b[43mobj\u001b[49m\u001b[43m)\u001b[49m\n\u001b[0;32m    232\u001b[0m \u001b[38;5;28;01mif\u001b[39;00m \u001b[38;5;28mcls\u001b[39m \u001b[38;5;129;01mis\u001b[39;00m \u001b[38;5;28;01mNone\u001b[39;00m:\n\u001b[0;32m    233\u001b[0m     \u001b[38;5;28mcls\u001b[39m \u001b[38;5;241m=\u001b[39m JSONEncoder\n",
-      "File \u001b[1;32m~\\Anaconda3\\envs\\h5tbx\\lib\\json\\encoder.py:199\u001b[0m, in \u001b[0;36mJSONEncoder.encode\u001b[1;34m(self, o)\u001b[0m\n\u001b[0;32m    195\u001b[0m         \u001b[38;5;28;01mreturn\u001b[39;00m encode_basestring(o)\n\u001b[0;32m    196\u001b[0m \u001b[38;5;66;03m# This doesn't pass the iterator directly to ''.join() because the\u001b[39;00m\n\u001b[0;32m    197\u001b[0m \u001b[38;5;66;03m# exceptions aren't as detailed.  The list call should be roughly\u001b[39;00m\n\u001b[0;32m    198\u001b[0m \u001b[38;5;66;03m# equivalent to the PySequence_Fast that ''.join() would do.\u001b[39;00m\n\u001b[1;32m--> 199\u001b[0m chunks \u001b[38;5;241m=\u001b[39m \u001b[38;5;28;43mself\u001b[39;49m\u001b[38;5;241;43m.\u001b[39;49m\u001b[43miterencode\u001b[49m\u001b[43m(\u001b[49m\u001b[43mo\u001b[49m\u001b[43m,\u001b[49m\u001b[43m \u001b[49m\u001b[43m_one_shot\u001b[49m\u001b[38;5;241;43m=\u001b[39;49m\u001b[38;5;28;43;01mTrue\u001b[39;49;00m\u001b[43m)\u001b[49m\n\u001b[0;32m    200\u001b[0m \u001b[38;5;28;01mif\u001b[39;00m \u001b[38;5;129;01mnot\u001b[39;00m \u001b[38;5;28misinstance\u001b[39m(chunks, (\u001b[38;5;28mlist\u001b[39m, \u001b[38;5;28mtuple\u001b[39m)):\n\u001b[0;32m    201\u001b[0m     chunks \u001b[38;5;241m=\u001b[39m \u001b[38;5;28mlist\u001b[39m(chunks)\n",
-      "File \u001b[1;32m~\\Anaconda3\\envs\\h5tbx\\lib\\json\\encoder.py:257\u001b[0m, in \u001b[0;36mJSONEncoder.iterencode\u001b[1;34m(self, o, _one_shot)\u001b[0m\n\u001b[0;32m    252\u001b[0m \u001b[38;5;28;01melse\u001b[39;00m:\n\u001b[0;32m    253\u001b[0m     _iterencode \u001b[38;5;241m=\u001b[39m _make_iterencode(\n\u001b[0;32m    254\u001b[0m         markers, \u001b[38;5;28mself\u001b[39m\u001b[38;5;241m.\u001b[39mdefault, _encoder, \u001b[38;5;28mself\u001b[39m\u001b[38;5;241m.\u001b[39mindent, floatstr,\n\u001b[0;32m    255\u001b[0m         \u001b[38;5;28mself\u001b[39m\u001b[38;5;241m.\u001b[39mkey_separator, \u001b[38;5;28mself\u001b[39m\u001b[38;5;241m.\u001b[39mitem_separator, \u001b[38;5;28mself\u001b[39m\u001b[38;5;241m.\u001b[39msort_keys,\n\u001b[0;32m    256\u001b[0m         \u001b[38;5;28mself\u001b[39m\u001b[38;5;241m.\u001b[39mskipkeys, _one_shot)\n\u001b[1;32m--> 257\u001b[0m \u001b[38;5;28;01mreturn\u001b[39;00m \u001b[43m_iterencode\u001b[49m\u001b[43m(\u001b[49m\u001b[43mo\u001b[49m\u001b[43m,\u001b[49m\u001b[43m \u001b[49m\u001b[38;5;241;43m0\u001b[39;49m\u001b[43m)\u001b[49m\n",
-      "File \u001b[1;32m~\\Anaconda3\\envs\\h5tbx\\lib\\json\\encoder.py:179\u001b[0m, in \u001b[0;36mJSONEncoder.default\u001b[1;34m(self, o)\u001b[0m\n\u001b[0;32m    160\u001b[0m \u001b[38;5;28;01mdef\u001b[39;00m \u001b[38;5;21mdefault\u001b[39m(\u001b[38;5;28mself\u001b[39m, o):\n\u001b[0;32m    161\u001b[0m \u001b[38;5;250m    \u001b[39m\u001b[38;5;124;03m\"\"\"Implement this method in a subclass such that it returns\u001b[39;00m\n\u001b[0;32m    162\u001b[0m \u001b[38;5;124;03m    a serializable object for ``o``, or calls the base implementation\u001b[39;00m\n\u001b[0;32m    163\u001b[0m \u001b[38;5;124;03m    (to raise a ``TypeError``).\u001b[39;00m\n\u001b[1;32m   (...)\u001b[0m\n\u001b[0;32m    177\u001b[0m \n\u001b[0;32m    178\u001b[0m \u001b[38;5;124;03m    \"\"\"\u001b[39;00m\n\u001b[1;32m--> 179\u001b[0m     \u001b[38;5;28;01mraise\u001b[39;00m \u001b[38;5;167;01mTypeError\u001b[39;00m(\u001b[38;5;124mf\u001b[39m\u001b[38;5;124m'\u001b[39m\u001b[38;5;124mObject of type \u001b[39m\u001b[38;5;132;01m{\u001b[39;00mo\u001b[38;5;241m.\u001b[39m\u001b[38;5;18m__class__\u001b[39m\u001b[38;5;241m.\u001b[39m\u001b[38;5;18m__name__\u001b[39m\u001b[38;5;132;01m}\u001b[39;00m\u001b[38;5;124m \u001b[39m\u001b[38;5;124m'\u001b[39m\n\u001b[0;32m    180\u001b[0m                     \u001b[38;5;124mf\u001b[39m\u001b[38;5;124m'\u001b[39m\u001b[38;5;124mis not JSON serializable\u001b[39m\u001b[38;5;124m'\u001b[39m)\n",
-      "\u001b[1;31mTypeError\u001b[0m: Object of type Group is not JSON serializable"
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "{\n",
+      "  \"@context\": {\n",
+      "    \"foaf\": \"http://xmlns.com/foaf/0.1/\",\n",
+      "    \"hdf5\": \"http://purl.allotrope.org/ontologies/hdf5/1.8#\",\n",
+      "    \"m4i\": \"http://w3id.org/nfdi4ing/metadata4ing#\",\n",
+      "    \"prov\": \"http://www.w3.org/ns/prov#\",\n",
+      "    \"rdfs\": \"http://www.w3.org/2000/01/rdf-schema#\",\n",
+      "    \"schema\": \"https://schema.org/\"\n",
+      "  },\n",
+      "  \"@graph\": [\n",
+      "    {\n",
+      "      \"@id\": \"_:N2184e583481449d4b18b3e073972033f\",\n",
+      "      \"@type\": \"hdf5:Group\",\n",
+      "      \"hdf5:attribute\": [\n",
+      "        {\n",
+      "          \"@id\": \"_:N7986e403d8f04107a4bc2311d62a03be\"\n",
+      "        },\n",
+      "        {\n",
+      "          \"@id\": \"_:N0c3d0fab7c174eca94da35519b3e0a5e\"\n",
+      "        },\n",
+      "        {\n",
+      "          \"@id\": \"_:N98dcd8dff5274d7f99392906789727b7\"\n",
+      "        },\n",
+      "        {\n",
+      "          \"@id\": \"_:N13e5600737ba4a7a98e48bd6025c75e9\"\n",
+      "        }\n",
+      "      ],\n",
+      "      \"hdf5:name\": \"/processing_info\",\n",
+      "      \"http://purl.obolibrary.org/obo/RO_0000057\": \"<HDF5 group \\\"/contact\\\" (0 members)>\",\n",
+      "      \"http://purl.obolibrary.org/obo/RO_0002234\": \"<HDF5 dataset \\\"random_velocity\\\": shape (100,), type \\\"<f8\\\">\",\n",
+      "      \"schema:startTime\": \"2024-03-25T21:42:05.541951\"\n",
+      "    },\n",
+      "    {\n",
+      "      \"@id\": \"_:N7986e403d8f04107a4bc2311d62a03be\",\n",
+      "      \"@type\": \"hdf5:Attribute\",\n",
+      "      \"hdf5:name\": \"end_time\",\n",
+      "      \"hdf5:value\": \"2024-03-25T21:42:05.541951\"\n",
+      "    },\n",
+      "    {\n",
+      "      \"@id\": \"_:N0c3d0fab7c174eca94da35519b3e0a5e\",\n",
+      "      \"@type\": \"hdf5:Attribute\",\n",
+      "      \"hdf5:name\": \"has_participants\",\n",
+      "      \"hdf5:value\": \"<HDF5 group \\\"/contact\\\" (0 members)>\"\n",
+      "    },\n",
+      "    {\n",
+      "      \"@id\": \"_:N98dcd8dff5274d7f99392906789727b7\",\n",
+      "      \"@type\": \"hdf5:Attribute\",\n",
+      "      \"hdf5:name\": \"output\",\n",
+      "      \"hdf5:value\": \"<HDF5 dataset \\\"random_velocity\\\": shape (100,), type \\\"<f8\\\">\"\n",
+      "    },\n",
+      "    {\n",
+      "      \"@id\": \"_:N13e5600737ba4a7a98e48bd6025c75e9\",\n",
+      "      \"@type\": \"hdf5:Attribute\",\n",
+      "      \"hdf5:name\": \"start_time\",\n",
+      "      \"hdf5:value\": \"2024-03-25T21:42:05.541951\"\n",
+      "    },\n",
+      "    {\n",
+      "      \"@id\": \"_:N6383734a746e4e28ab03cd638a807c9c\",\n",
+      "      \"@type\": \"hdf5:Group\",\n",
+      "      \"hdf5:attribute\": [\n",
+      "        {\n",
+      "          \"@id\": \"_:N16efc6a167ba4fc8b90eca02f5a732fb\"\n",
+      "        },\n",
+      "        {\n",
+      "          \"@id\": \"_:N6faa04607dcf4a8c8a11311d21bf7eb7\"\n",
+      "        }\n",
+      "      ],\n",
+      "      \"hdf5:name\": \"/h5rdmtoolbox\",\n",
+      "      \"schema:codeRepository\": {\n",
+      "        \"@type\": \"http://www.w3.org/2001/XMLSchema#anyURI\",\n",
+      "        \"@value\": \"https://github.com/matthiasprobst/h5RDMtoolbox\"\n",
+      "      },\n",
+      "      \"schema:softwareVersion\": \"1.2.3a2\"\n",
+      "    },\n",
+      "    {\n",
+      "      \"@id\": \"_:N16efc6a167ba4fc8b90eca02f5a732fb\",\n",
+      "      \"@type\": \"hdf5:Attribute\",\n",
+      "      \"hdf5:name\": \"__h5rdmtoolbox_version__\",\n",
+      "      \"hdf5:value\": \"1.2.3a2\"\n",
+      "    },\n",
+      "    {\n",
+      "      \"@id\": \"_:N6faa04607dcf4a8c8a11311d21bf7eb7\",\n",
+      "      \"@type\": \"hdf5:Attribute\",\n",
+      "      \"hdf5:name\": \"codeRepository\",\n",
+      "      \"hdf5:value\": {\n",
+      "        \"@type\": \"http://www.w3.org/2001/XMLSchema#anyURI\",\n",
+      "        \"@value\": \"https://github.com/matthiasprobst/h5RDMtoolbox\"\n",
+      "      }\n",
+      "    },\n",
+      "    {\n",
+      "      \"@id\": \"_:N99693562a6694eb1ab8e05cbbc44a43f\",\n",
+      "      \"@type\": \"hdf5:Group\",\n",
+      "      \"foaf:firstName\": \"Matthias\",\n",
+      "      \"hdf5:attribute\": [\n",
+      "        {\n",
+      "          \"@id\": \"_:N59772cf8cd4a46dab458df0990d73602\"\n",
+      "        },\n",
+      "        {\n",
+      "          \"@id\": \"_:Nd62cfa9c5a6848529522c7fb07b9146d\"\n",
+      "        }\n",
+      "      ],\n",
+      "      \"hdf5:name\": \"/contact\",\n",
+      "      \"m4i:orcid\": {\n",
+      "        \"@type\": \"http://www.w3.org/2001/XMLSchema#anyURI\",\n",
+      "        \"@value\": \"https://orcid.org/0000-0001-8729-0482\"\n",
+      "      }\n",
+      "    },\n",
+      "    {\n",
+      "      \"@id\": \"_:N59772cf8cd4a46dab458df0990d73602\",\n",
+      "      \"@type\": \"hdf5:Attribute\",\n",
+      "      \"hdf5:name\": \"first_name\",\n",
+      "      \"hdf5:value\": \"Matthias\"\n",
+      "    },\n",
+      "    {\n",
+      "      \"@id\": \"_:Nd62cfa9c5a6848529522c7fb07b9146d\",\n",
+      "      \"@type\": \"hdf5:Attribute\",\n",
+      "      \"hdf5:name\": \"orcid\",\n",
+      "      \"hdf5:value\": {\n",
+      "        \"@type\": \"http://www.w3.org/2001/XMLSchema#anyURI\",\n",
+      "        \"@value\": \"https://orcid.org/0000-0001-8729-0482\"\n",
+      "      }\n",
+      "    },\n",
+      "    {\n",
+      "      \"@id\": \"_:N36c07aadae0341c9bb9f27b70e38e100\",\n",
+      "      \"@type\": \"hdf5:Dataset\",\n",
+      "      \"hdf5:attribute\": [\n",
+      "        {\n",
+      "          \"@id\": \"_:N8b14944de63a44168361ada36033986a\"\n",
+      "        },\n",
+      "        {\n",
+      "          \"@id\": \"_:N907911ceaea64cc5bfb35664552b27f5\"\n",
+      "        }\n",
+      "      ],\n",
+      "      \"hdf5:datatype\": \"H5T_INTEGER\",\n",
+      "      \"hdf5:name\": \"/random_velocity\",\n",
+      "      \"hdf5:size\": 100,\n",
+      "      \"m4i:hasKindOfQuantity\": {\n",
+      "        \"@id\": \"http://qudt.org/vocab/quantitykind/Velocity\"\n",
+      "      },\n",
+      "      \"m4i:hasUnit\": {\n",
+      "        \"@id\": \"http://qudt.org/vocab/unit/M-PER-SEC\"\n",
+      "      }\n",
+      "    },\n",
+      "    {\n",
+      "      \"@id\": \"_:N8b14944de63a44168361ada36033986a\",\n",
+      "      \"@type\": \"hdf5:Attribute\",\n",
+      "      \"hdf5:name\": \"quantity_kind\",\n",
+      "      \"hdf5:value\": \"velocity\"\n",
+      "    },\n",
+      "    {\n",
+      "      \"@id\": \"_:N907911ceaea64cc5bfb35664552b27f5\",\n",
+      "      \"@type\": \"hdf5:Attribute\",\n",
+      "      \"hdf5:name\": \"units\",\n",
+      "      \"hdf5:value\": \"m/s\"\n",
+      "    },\n",
+      "    {\n",
+      "      \"@id\": \"_:Ndd6d11934a1e4555928252a11e2f87b5\",\n",
+      "      \"@type\": \"hdf5:Group\",\n",
+      "      \"hdf5:name\": \"/\",\n",
+      "      \"schema:author\": {\n",
+      "        \"@id\": \"Ncf2ed4e4446b4a368a739595b9962351\"\n",
+      "      }\n",
+      "    }\n",
+      "  ]\n",
+      "}\n"
+     ]
+    },
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "C:\\Users\\da4323\\Documents\\programming\\GitHub\\h5RDMtoolbox\\h5rdmtoolbox\\wrapper\\jsonld.py:337: UserWarning: Could not serialize <HDF5 group \"/contact\" (0 members)> to JSON. Will apply str(). Error: Object of type Group is not JSON serializable\n",
+      "  warnings.warn(f'Could not serialize {av} to JSON. Will apply str(). Error: {e}')\n",
+      "C:\\Users\\da4323\\Documents\\programming\\GitHub\\h5RDMtoolbox\\h5rdmtoolbox\\wrapper\\jsonld.py:337: UserWarning: Could not serialize <HDF5 dataset \"random_velocity\": shape (100,), type \"<f8\"> to JSON. Will apply str(). Error: Object of type Dataset is not JSON serializable\n",
+      "  warnings.warn(f'Could not serialize {av} to JSON. Will apply str(). Error: {e}')\n"
      ]
     }
    ],
    "source": [
     "print(\n",
-    "    jsonld.h5dumps(\n",
+    "    jsonld.dumps(\n",
     "        hdf_filename,\n",
     "        indent=2,\n",
     "        context={'m4i': 'http://w3id.org/nfdi4ing/metadata4ing#',\n",
@@ -1430,7 +1585,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 11,
    "id": "8c913948-8ba9-4409-b052-559e7c8e3a72",
    "metadata": {},
    "outputs": [],
@@ -1455,7 +1610,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 12,
    "id": "77a35de3-b332-4e4f-b52d-324e9f02465c",
    "metadata": {},
    "outputs": [],
@@ -1475,10 +1630,21 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 13,
    "id": "36af4e53-a34b-4140-9e26-7205183b776e",
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "'http://xmlns.com/foaf/0.1/Person'"
+      ]
+     },
+     "execution_count": 13,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
     "person_iri"
    ]
@@ -1493,10 +1659,21 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 14,
    "id": "ac5daa0d-c51b-4331-b53b-db916005fc2a",
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "'http://w3id.org/nfdi4ing/metadata4ing#orcid'"
+      ]
+     },
+     "execution_count": 14,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
     "orcid_iri"
    ]
@@ -1511,10 +1688,21 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 15,
    "id": "59600274-baf3-42b8-8f82-da8fb705bd72",
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "<Graph identifier=Nceba754f716a4ed1972fd8decae720fd (<class 'rdflib.graph.Graph'>)>"
+      ]
+     },
+     "execution_count": 15,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
     "import rdflib.graph as g\n",
     "\n",
@@ -1532,7 +1720,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 16,
    "id": "edd3ca6e-475c-4ef2-87f9-9794993dfe35",
    "metadata": {},
    "outputs": [],
@@ -1551,7 +1739,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 17,
    "id": "091dcaf7-3c38-45d2-9bda-5e207f03bf17",
    "metadata": {},
    "outputs": [],
@@ -1580,7 +1768,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 18,
    "id": "6bca4659-0d68-4965-9059-7ebafda010f3",
    "metadata": {},
    "outputs": [],
@@ -1599,10 +1787,19 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 19,
    "id": "21788a70-ce78-4262-b7c4-553df8f85981",
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "C:\\Users\\da4323\\Documents\\programming\\GitHub\\h5RDMtoolbox\\h5rdmtoolbox\\utils.py:56: UserWarning: No hash given! This is recommended when downloading files from the web.\n",
+      "  warnings.warn('No hash given! This is recommended when downloading files from the web.', UserWarning)\n"
+     ]
+    }
+   ],
    "source": [
     "codemeta_url = 'https://raw.githubusercontent.com/matthiasprobst/h5RDMtoolbox/main/codemeta.json'\n",
     "dowloaded_filename = download_file(codemeta_url, None)"
@@ -1618,7 +1815,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 20,
    "id": "bb20c8fd-1075-4575-88da-c85e6af81a68",
    "metadata": {},
    "outputs": [],
@@ -1628,10 +1825,57 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 21,
    "id": "654415a2-ea18-4d43-b692-f5db58f2a615",
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "{'@context': {'applicationCategory': 'http://schema.org/applicationCategory',\n",
+      "              'author': 'http://schema.org/author',\n",
+      "              'codeRepository': 'http://schema.org/codeRepository',\n",
+      "              'description': 'http://schema.org/description',\n",
+      "              'license': 'http://schema.org/license',\n",
+      "              'name': 'http://schema.org/name',\n",
+      "              'operatingSystem': 'http://schema.org/operatingSystem',\n",
+      "              'programmingLanguage': 'http://schema.org/programmingLanguage',\n",
+      "              'version': 'http://schema.org/version'},\n",
+      " '@type': 'http://schema.org/SoftwareSourceCode',\n",
+      " 'applicationCategory': 'file:///C:/Users/da4323/AppData/Local/h5rdmtoolbox/h5rdmtoolbox/tmp/tmp_0/Engineering',\n",
+      " 'author': [{'@type': 'http://schema.org/Person',\n",
+      "             'affiliation': {'@type': 'http://schema.org/Organization',\n",
+      "                             'name': 'Karlsruhe Institute of Technology, '\n",
+      "                                     'Institute of Thermal Turbomachinery'},\n",
+      "             'familyName': 'Büttner',\n",
+      "             'givenName': 'Lucas',\n",
+      "             'id': 'https://orcid.org/0000-0002-4116-0065'},\n",
+      "            {'@type': 'http://schema.org/Person',\n",
+      "             'affiliation': {'@type': 'http://schema.org/Organization',\n",
+      "                             'name': 'Karlsruhe Institute of Technology, '\n",
+      "                                     'Institute of Thermal Turbomachinery'},\n",
+      "             'email': 'matthias.probst@kit.edu',\n",
+      "             'familyName': 'Probst',\n",
+      "             'givenName': 'Matthias',\n",
+      "             'id': 'https://orcid.org/0000-0001-8729-0482'}],\n",
+      " 'codeRepository': 'git+https://github.com/matthiasprobst/h5RDMtoolbox.git',\n",
+      " 'description': 'Supporting a FAIR Research Data lifecycle using Python and '\n",
+      "                'HDF5.',\n",
+      " 'id': 'N20ef1377e5a646e99474081ae245d0e5',\n",
+      " 'license': 'https://spdx.org/licenses/MIT',\n",
+      " 'name': 'h5RDMtoolbox',\n",
+      " 'operatingSystem': ['Linux', 'Windows', 'macOS'],\n",
+      " 'programmingLanguage': ['Python 3',\n",
+      "                         'Python 3.8',\n",
+      "                         'Python 3.9',\n",
+      "                         'Python 3.10',\n",
+      "                         'Python 3.11',\n",
+      "                         'Python 3.12'],\n",
+      " 'version': '1.2.3a1'}\n"
+     ]
+    }
+   ],
    "source": [
     "data = dquery(subject='schema:SoftwareSourceCode',\n",
     "              source=dowloaded_filename,\n",
@@ -1649,10 +1893,324 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 22,
    "id": "eed644e6-8ddd-4dc3-9eea-c83fa7825cf0",
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
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+       ".h5tb-var-list li > span {\r\n",
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+       "\r\n",
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+       "                        <label style=\"font-weight: bold\" for=\"group-ds--7862854400\">\n",
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+       "                  \n",
+       "\n",
+       "                    <ul class=\"h5tb-attr-list\"><li style=\"list-style-type: none; font-style: italic\">@id : <a href=\"https://orcid.org/0000-0002-4116-0065\"><img alt=\"ORCID logo\" src=\"https://info.orcid.org/wp-content/uploads/2019/11/orcid_16x16.png\" width=\"16\" height=\"16\" />https://orcid.org/0000-0002-4116-0065</a></li><li style=\"list-style-type: none; font-style: italic\">familyName : Büttner</li><li style=\"list-style-type: none; font-style: italic\">givenName : Lucas</li>\n",
+       "                    </ul>\n",
+       "\n",
+       "              <ul style=\"list-style-type: none;\" class=\"h5grp-sections\">\n",
+       "                    <li>\n",
+       "                        <input id=\"group-ds-affiliation-7865232700\" type=\"checkbox\" checked>\n",
+       "                        <label style=\"font-weight: bold\" for=\"group-ds-affiliation-7865232700\">\n",
+       "                        affiliation<a href=\"http://schema.org/Organization\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">@type: http://schema.org/Organization</span></a><span>(0)</span></label>\n",
+       "                  \n",
+       "\n",
+       "                    <ul class=\"h5tb-attr-list\"><li style=\"list-style-type: none; font-style: italic\">name<a href=\"http://schema.org/name\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">http://schema.org/name</span></a> : Karlsruhe Institute of Technology, Institute of Thermal Turbomachinery</li>\n",
+       "                    </ul>\n",
+       "</li>\n",
+       "</ul>\n",
+       "</li>\n",
+       "</ul>\n",
+       "\n",
+       "              <ul style=\"list-style-type: none;\" class=\"h5grp-sections\">\n",
+       "                    <li>\n",
+       "                        <input id=\"group-ds-author2-7865677900\" type=\"checkbox\" checked>\n",
+       "                        <label style=\"font-weight: bold\" for=\"group-ds-author2-7865677900\">\n",
+       "                        author2<a href=\"http://schema.org/author\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">http://schema.org/author</span></a><a href=\"http://schema.org/Person\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">@type: http://schema.org/Person</span></a><span>(1)</span></label>\n",
+       "                  \n",
+       "\n",
+       "                    <ul class=\"h5tb-attr-list\"><li style=\"list-style-type: none; font-style: italic\">@id : <a href=\"https://orcid.org/0000-0001-8729-0482\"><img alt=\"ORCID logo\" src=\"https://info.orcid.org/wp-content/uploads/2019/11/orcid_16x16.png\" width=\"16\" height=\"16\" />https://orcid.org/0000-0001-8729-0482</a></li><li style=\"list-style-type: none; font-style: italic\">email : matthias.probst@kit.edu</li><li style=\"list-style-type: none; font-style: italic\">familyName : Probst</li><li style=\"list-style-type: none; font-style: italic\">givenName : Matthias</li>\n",
+       "                    </ul>\n",
+       "\n",
+       "              <ul style=\"list-style-type: none;\" class=\"h5grp-sections\">\n",
+       "                    <li>\n",
+       "                        <input id=\"group-ds-affiliation-7866920300\" type=\"checkbox\" checked>\n",
+       "                        <label style=\"font-weight: bold\" for=\"group-ds-affiliation-7866920300\">\n",
+       "                        affiliation<a href=\"http://schema.org/Organization\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">@type: http://schema.org/Organization</span></a><span>(0)</span></label>\n",
+       "                  \n",
+       "\n",
+       "                    <ul class=\"h5tb-attr-list\"><li style=\"list-style-type: none; font-style: italic\">name<a href=\"http://schema.org/name\" target=\"_blank\" class=\"tooltip\"> <img class=\"size_of_img\" src=\"https://github.com/matthiasprobst/h5RDMtoolbox/blob/dev/h5rdmtoolbox/data/iri_icon.png?raw=true\" alt=\"Image 1\" width=\"16\" height=\"16\" /> <span class=\"tooltiptext\">http://schema.org/name</span></a> : Karlsruhe Institute of Technology, Institute of Thermal Turbomachinery</li>\n",
+       "                    </ul>\n",
+       "</li>\n",
+       "</ul>\n",
+       "</li>\n",
+       "</ul>\n",
+       "</li>\n",
+       "</ul>\n",
+       "</li>\n",
+       "</ul>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "<IPython.core.display.HTML object>"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
    "source": [
     "with h5tbx.File('test.hdf', 'w') as h5:\n",
     "    jsonld.to_hdf(data=data[0],\n",
diff --git a/h5rdmtoolbox/wrapper/jsonld.py b/h5rdmtoolbox/wrapper/jsonld.py
index f961f5b8..5e0bc425 100644
--- a/h5rdmtoolbox/wrapper/jsonld.py
+++ b/h5rdmtoolbox/wrapper/jsonld.py
@@ -5,12 +5,12 @@
 import pathlib
 import rdflib
 import warnings
+from ontolutils.classes.thing import resolve_iri
+from ontolutils.classes.utils import split_URIRef
 from rdflib import Graph, URIRef, Literal, BNode, XSD, RDF
 from typing import Dict, Optional, Union, List, Iterable, Tuple, Any
 
 from h5rdmtoolbox.convention import hdf_ontology
-from ontolutils.classes.thing import resolve_iri
-from ontolutils.classes.utils import split_URIRef
 from .core import Dataset, File
 from ..convention.hdf_ontology import HDF5
 
@@ -123,12 +123,14 @@ def to_hdf(grp,
 
     for k, v in data.items():
 
-        if k == '@id':
-            rdf_predicate = None
-            if v.startswith('http'):
-                value_predicate = k
-            else:
-                continue
+        if k in ('@id', 'id'):
+            grp.attrs.create(name="@id", data=v)
+            continue
+            # rdf_predicate = None
+            # if v.startswith('http'):
+            #     value_predicate = k
+            # else:
+            #     continue
         elif k == '@type':
             grp.rdf.subject = resolve_iri(v, data_context)
             continue
@@ -326,8 +328,15 @@ def _add_hdf_node(name, obj):
                     # unknown type --> dump it with json
                     if isinstance(av, np.ndarray):
                         attr_literal = rdflib.Literal(json.dumps(av.tolist()))
+                    # elif isinstance(av, (h5py.Group, h5py.Dataset)):
+                    #     attr_literal = rdflib.Literal(av.name)
                     else:
-                        attr_literal = rdflib.Literal(json.dumps(av))
+                        try:
+                            attr_literal = rdflib.Literal(json.dumps(av))
+                        except TypeError as e:
+                            warnings.warn(f'Could not serialize {av} to JSON. Will apply str(). Error: {e}')
+                            attr_literal = rdflib.Literal(str(av))
+
                 # add node for attr value
                 if attr_literal:
                     _add_node(g, (attr_node, HDF5.value, attr_literal))
diff --git a/tests/wrapper/test_rdf.py b/tests/wrapper/test_rdf.py
index 6dc3fa11..3c009797 100644
--- a/tests/wrapper/test_rdf.py
+++ b/tests/wrapper/test_rdf.py
@@ -3,6 +3,7 @@
 from rdflib import FOAF
 
 import h5rdmtoolbox as h5tbx
+from h5rdmtoolbox import jsonld
 from h5rdmtoolbox import use
 from h5rdmtoolbox.wrapper.rdf import RDFError
 from h5rdmtoolbox.wrapper.rdf import RDF_PREDICATE_ATTR_NAME
@@ -47,8 +48,6 @@ def test_group_predicate(self):
             grp.rdf.subject = 'http://xmlns.com/foaf/0.1/Person'
             print(grp.rdf.subject)
 
-            from h5rdmtoolbox import jsonld
-
         print(
             jsonld.dumps(
                 h5.hdf_filename,