n.The set of terms used in an index or in the headings of a catalog.ComputingThe set of labels used in an Extensible Markup Language (XML) document.
Citations
St. Laurent 2000, p. 3 A set of [XML] labels is often called a vocabulary. When large groups of people can accept a common vocabulary, or even declare it a standard of some sort, applications of many different kinds on many different kinds of computers and networks can share an understanding of the contents of XML documents using that vocabulary.
