OperationalLimitSet attached to ACLineSegment without EquipmentContainer is discarded at CGMES import

[rcourtier]

Describe the current behavior

OperationalLimitSet attached to ACLineSegment without EquipmentContainer is discarded at CGMES import

Describe the expected behavior

OperationalLimitSet attached to ACLineSegment without EquipmentContainer is correctly read at CGMES import

Describe the steps

• Prepare a CGMES file with an OperationalLimitSet associated to an Equipment of type ACLineSegment which doesn't have an EquipmentContainer
• Read the CGMES file
• The ACLineSegment has been imported, but the limits haven't.

Environment

Tested with a CIM16 file

Relevant Log Output

No response

Extra Information

The issue comes from the fact that the SPARQL resquest expects the Equipment to have an EquipmentContainer. However, the association is not mandatory in CGMES and it's not uncommon to model an ACLineSegment without Line container, so this use case is not so rare.
The EquipmentContainer in the SPARQL request should be made optional.