SYNTAX:
xpxGetEntityExtent (modelId , entityId , VAR extentId : SET OF GENERIC) status : INTEGER;
The xpxGetEntityExtent function returns the aggregateId of the specified entity_extent aggregate. The actual instance type is defined by the modelId and entityId arguments. The aggregateId of the actual entity_extent is returned in the extentId argument.
An entity_extent aggregate is a SET that contains all instances of the same type in a model. The number of entity_extents in a model is equal to the number of possible instance types in the model.
This function is equivalent to the EDMinterface function sdaiGetEntityExtent
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