
sem:isBlank( $value as xs:anyAtomicType ) as xs:boolean
  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.
| Parameters | |
|---|---|
| value | The value to test. | 
sem:isBlank(sem:bnode()) => true
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