This is the extension point for 17.6 (Extensible Value Testing) of the SPARQL spec.
Abstract stub implementation of a Function.
Function implementations correspond to some
defined XPath function, which is usually noted in the documentation for the function itself. There are a few which
are non-XPath functions which are specific to either the SPARQL specification or SWRL.
XPathFunctions for an incomplete list of which XPath
functions are implemented in Stardog.
Functions available via
FunctionRegistry can be used as
custom SPARQL functions at query time. See
information on binding new implementations of
Function at runtime.
Registration of the core Stardog Functions is performed by
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