This is the source code for the list of interoperable user defined functions for the Astronomical Data Query Language ADQL. To understand where this fits into the Virtual Observatory, see the ADQL Standard, sect. 4.3 (in version 2.2).

Stable versions of this are published in the IVOA document repository at https://ivoa.net/documents/udf-catalogue/.

To build a PDF version this document, you will need a reasonably complete LaTeX installation, a sufficiently capable make, preferably latexmk and probably rsvg-convert. For further details, see ivoatexDoc.

Informationally – and for the benefit of implementors looking for patterns possibly already established –, we include a list of non-ivo UDFs found in a census of TAP services in the VO; this is updated now and then and of course entirely non-normative. See: udf_list.rst.

This document is distributed under CC-BY-SA.