Specifies a Variable Expression or array of Variable Expressions that
define [inline allowable value combinations]. This is a short-hand for
including values in Groups in the
specifies a pattern to match, or an array of patterns to match. Each can be a Subject, a Group, or another Query (a sub-query).
A JSON-LD Context for the query. In an API, this will frequently be implicit. For example, using json-rql as the body of a
http://example.com/my-api/v1/person/querymight have the implicit context of a Person (possibly found at