MarkLogic Server 11.0 Product Documentation

sem:isBlank

sem:isBlank(
   $value as xs:anyAtomicType
) as xs:boolean

Summary

Returns true if the argument is an RDF blank node - that is, derived from type sem:blank. This XQuery function backs up the SPARQL isBlank() function.

This function is a built-in.

Example

sem:isBlank(sem:bnode())
=>
true