Concept "IsRootPredicate"

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dataspects canonical ES index mapping contains domain-agnostic root fields (predicates) and nested annotations that accommodate domain-specific predicates.
EntityType "Concept"


See below…

DS Version 1

When registering an allowed predicate, you must specify whether that predicate is a root predicate or not, so that when composing ES queries, that predicate can be queried correctly.

DS Version 2

Consider polymorphism.