IVOA Recommendation: An IVOA Standard for Unified Content Descriptors Version 1.1 [article]

Sébastien Derriere, Norman Gray, Robert Mann, Andrea Preite Martinez, Jonathan McDowell, Thomas Mc Glynn, François Ochsenbein, Pedro Osuna, Guy Rixon, Roy Williams
2011 arXiv   pre-print
This document describes the current understanding of the IVOA controlled vocabulary for describing astronomical data quantities, called Unified Content Descriptors (UCDs). The present document defines a new standard (named UCD1+) improving the first generation of UCDs (hereafter UCD1). The basic idea is to adopt a new syntax and vocabulary requiring little effort for people to adapt softwares already using UCD1. This document also addresses the questions of maintenance and evolution of the
more » ... . Examples of use cases within the VO, and tools for using UCD1+ are also described.
arXiv:1110.0525v1 fatcat:dsagn4mwtvfermzlije7qrwobu