Merge pull request #974 from mandy-chessell/code2024

Add placeholder for postgres repository connector

site/docs/connectors/repository/postgres/overview.md

@@ -0,0 +1,43 @@
+<!-- SPDX-License-Identifier: CC-BY-4.0 -->
+<!-- Copyright Contributors to the ODPi Egeria project. -->
+
+
+--8<-- "snippets/content-status/in-development.md"
+
+# PostgreSQL Repository Connector
+
+!!! info "Connector summary"
+
+    - Connector Category: [Native Repository Connector](/concepts/repository-connector)
+    - Hosting Service: [Open Metadata Repository Services (OMRS)](/services/omrs)
+    - Hosting Server: [Metadata Access Store](/concepts/metdata-access-store)
+    - Source Module: [postgres-repository-connector :material-github:](https://github.com/odpi/egeria/tree/main/open-metadata-implementation/adapters/open-connectors/repository-services-connectors/open-metadata-collection-store-connectors/postgres-repository-connector){ target=gh }
+    - Jar File Name: `postgres-repository-connector.jar`
+    - ConnectorProviderClassName: `org.odpi.openmetadata.adapters.repositoryservices.inmemory.repositoryconnector/PostgresOMRSRepositoryConnectorProvider.java`
+
+
+The PostgreSQL OMRS Repository Connector provides a repository implementation that stores metadata in a PostgreSQL Database.  Each Open Metadata Repository uses the same table structure within its own Database Schema.  This database schema is managed by a single instance of the PostgreSQL Repository Connector.
+
+Access to the PostgreSQL Database Schema is provided by the [JDBC Resource Connector](/connectors/resource/jdbc-resource-connector).  This connector manages the SQL Queries, connection management and use of the secrets store for security connections.
+
+The diagram below shows the tables used in the PostgreSQL Database Schema.
+
+```mermaid
+---
+title: PostgreSQL Repository Database Schema
+---
+
+erDiagram
+    entity ||--o{ mapping_properties : "optional third party mapping"
+    relationship ||--o{ mapping_properties : "optional third party mapping"
+    entity |o--|| instance_properties : "entity properties"
+    classification |o--|| instance_properties : "classification properties"
+    relationship |o--|| instance_properties : "relationship properties"
+
+    instance_properties ||--o{ instance_property_value : manages
+    instance_property_value |o--o| instance_properties : "is collection to"
+   
+```
+
+--8<-- "snippets/abbr.md"
+

site/mkdocs.yml

@@ -102,6 +102,7 @@ nav:
                     - Open Lineage Cataloguer: connectors/integration/open-lineage-cataloguer-integration-connector.md
                     - Open Lineage Events from Governance Action: connectors/integration/governance-action-open-lineage-integration-connector.md
               - Open Metadata Repositories:
+                    - PostgreSQL: connectors/repository/postgres/overview.md
                     - XTDB:
                           - XTDB OMRS Repository Connector: connectors/repository/xtdb/index.md
                           - Upgrading the XTDB Connector: connectors/repository/xtdb/upgrade.md