MarkLogic 9 Product Documentationsem.rdfBuilder
sem.rdfBuilder( [prefixes as Object?], [graph as sem.iri?] ) as function(item(),item(),item()) as sem.triple
Summary
This function returns a function that builds triples
from CURIE and blank node syntax. The resulting function takes
three string arguments, representing subject, predicate,
and object respectively, which returns a sem:triple object
using the graph and prefix mappings passed in to the call to
sem:rdf-builder.
Blank nodes specified with a leading underscore (_) will
be assigned blank node identifiers, and will maintain that
identity across multiple invocations; for example,
"_:person1" will refer to the same node as a later
invocation that also mentions "_:person1". In the
predicate position, the special value of "a" will be
interpreted as the same as "rdf:type".
| Parameters | |
|---|---|
| prefixes | An optional set of prefix mappings. |
| graph | The graph value in which to place triples. Defaults to "http://marklogic.com/semantics#default-graph". |
Usage Notes
If you pass in a string tosem:rdf-builder, it will be
interpreted as a CURIE. If you want it to be interpreted as an IRI,
then cast the string to an IRI using sem:iri.
Example
var sem = require("/MarkLogic/semantics.xqy");
var prefixes = {"a": "http://marklogic.com/a"};
var fac = sem.rdfBuilder();
xdmp.apply(fac, "_:person1", "a", "foaf:Person");
=>
sem.triple(
sem.blank("http://marklogic.com/semantics/blank/6198496751368939587"),
sem.iri("http://www.w3.org/1999/02/22-rdf-syntax-ns#type"),
sem.iri("http://xmlns.com/foaf/0.1/Person"))