ANSI/NISO Z39.102-2017

8 ANSI/NISO Z39.102-2017 STS (Version 1.0) • 8.2 Attributes

8.2.168 @xmlns:xsi XML Schema Namespace Declaration

This is not an attribute, but a namespace pseudo-attribute. The value provides a URI to use for the @xsi_schemaLocation attribute. All namespace prefixes must be associated with a URL, and the prefix xsi has been set to the URL for the World Wide Web Consortium (W3C) XML Schema.

In elements <adoption> and <standard>, this attribute must have the value http://www.w3.org/2001/XMLSchema-instance (as given below).
Value Meaning
http://www.w3.org/2001/XMLSchema-instance The prefix xsi has been set to the URL for W3C XML Schema.