.. _SPARQLPropertyFunctionsLibrary:

SPARQL Property Functions Library
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Property Functions are SPARQL features that are invoked using a syntax similar to
triple match patterns.
In these, the name of the property function is used in the predicate position.
This is why they are sometimes called *magic properties*.

TopBraid's :ref:`SPARQLEngine` includes a library of property functions, including those
defined by the Apache Jena API but also several significant extensions that are native to TopBraid.

.. hint::
  To see a list of supported functions, including the property functions, press the Help button in the
   :ref:`SPARQLQueryPanel`.

Advanced users of TopBraid can define their own SPARQL property functions using the :ref:`DASHVocabulary`
as instances of `dash:MultiFunction`.


**Further Reading on SPARQL Property Functions**

* `DASH Multi-Functions (External Link) <https://datashapes.org/multifunctions.html>`_

**Further Reading on TopBraid**

* :ref:`introduction`