In RDF, a blank node (also called bnode) is a node in an RDF graph representing a resource for which a URI or literal is not given. The resource represented by a blank node is also called an anonymous resource. By RDF standard a blank node can only be used as subject or object in an RDF triple, although in some syntaxes like Notation 3 it is acceptable to use a blank node as a predicate. If a blank node has a node ID (not all blank nodes are labeled in all RDF serializations), it is limited in scope to a serialization of a particular RDF graph, i.e. the node p1 in the subsequent example does not represent the same node as a node named p1 in any other graph.
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Famous quotes containing the word blank:
“Oh, blank confusion! true epitome
Of what the mighty city is herself,
To thousands upon thousands of her sons,
Living amid the same perpetual whirl
Of trivial objects, melted and reduced
To one identity, by differences
That have no law, no meaning, and no end—”
—William Wordsworth (1770–1850)