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SYNTAX:
 
xpxCreateAggr (instanceId, attributeId, VAR aggregateId : GENERIC)               status                                   : INTEGER;
 
The xpxCreateAggr function will create a persistent aggregate and connect the created aggregate to the attribute attributeId in the specified instance instanceId. The actual aggregate properties are found in the attribute_definition in the dictionary model of the actual EXPRESS schema. The instanceId of the created aggregate will be returned in the aggregateId argument.
This function is equivalent to the EDMinterface function sdaiCreateAggr

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