model.base: Remove occurrences of deprecated constraint AASd-100

basyx/aas/model/base.py

@@ -630,8 +630,6 @@ def _set_category(self, category: Optional[NameType]):
  """
  Check the input string
 
- Constraint AASd-100: An attribute with data type "string" is not allowed to be empty
-
  :param category: The category is a value that gives further meta information w.r.t. to the class of the element.
  It affects the expected existence of attributes and the applicability of constraints.
  :raises ValueError: if the constraint is not fulfilled
@@ -2272,13 +2270,9 @@ def _set_unit(self, unit: Optional[str]):
  """
  Check the input string
 
- Constraint AASd-100: An attribute with data type "string" is not allowed to be empty
-
  :param unit: unit of the data object (optional)
  :raises ValueError: if the constraint is not fulfilled
  """
- if unit == "":
- raise ValueError("unit is not allowed to be an empty string")
  self._unit = unit
 
  def _get_unit(self):
@@ -2290,13 +2284,9 @@ def _set_source_of_definition(self, source_of_definition: Optional[str]):
  """
  Check the input string
 
- Constraint AASd-100: An attribute with data type "string" is not allowed to be empty
-
  :param source_of_definition: source of the definition (optional)
  :raises ValueError: if the constraint is not fulfilled
  """
- if source_of_definition == "":
- raise ValueError("source_of_definition is not allowed to be an empty string")
  self._source_of_definition = source_of_definition
 
  def _get_source_of_definition(self):
@@ -2308,13 +2298,9 @@ def _set_symbol(self, symbol: Optional[str]):
  """
  Check the input string
 
- Constraint AASd-100: An attribute with data type "string" is not allowed to be empty
-
  :param symbol: unit symbol (optional)
  :raises ValueError: if the constraint is not fulfilled
  """
- if symbol == "":
- raise ValueError("symbol is not allowed to be an empty string")
  self._symbol = symbol
 
  def _get_symbol(self):