18.104.22.168 XML mention domain
Use the XML-mention domain elements for mentions of named XML constructs, including
elements, attributes, entities, processing instructions, and document-type declaration
components. These elements enable specific typographic effects for different construct types,
precise search and retrieval of specific constructs, and automatic indexing of different
constructs. This domain is intended to support the description and documentation of XML
document types and XML applications.
Although the original XML 1.0 Recommendation specifically reserved element
names beginning with "xml" or "XML"' for the use of the XML standard itself, the subsequent
introduction of namespaces made the restriction unnecessary. The restriction was formally
removed in the XML 1.0 Fifth Edition Specification Errata
. The OASIS DITA Technical
Committee acknowledges this revised policy in its use of the semantically precise prefix "xml"
for the XML mention domain.