This document defines the use and development of interoperable vocabularies (i.e., lists of commonly-understood terms including labels, descriptions, and a small set of relationships between these terms) in the Virtual Observatory.

Stable versions of this document are available through the IVOA document repository.

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.

This document is distributed under CC-BY-SA.

There was a previous major version of this document that does not share history with this version. Its sources are still available through volute.