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SYNTAX:
 
xpxGetEntityExtentBN (modelId     : GENERIC;
                     entityName   : STRING;                     VAR extentId : SET OF GENERIC)
                     status       : INTEGER;
 
The xpxGetEntityExtentBN function returns the aggregateId of the specified entity_extent aggregate. The actual instance type is defined by the modelId and entityName 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 sdaiGetEntityExtentBN

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