EntityProperty

EntityProperty[type,pname] represents a property identified by pname for use in EntityValue.

EntityProperty[class,pname] represents a property introduced by the computed entity class class.

EntityProperty[type,pname,{qual1->val1,qual2->val2,…}] represents a property modified by the qualifier rules quali->vali.

Please visit the official Wolfram Language Reference for more details and examples on core symbols.