XML Base Tutorial
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XML Base is described in the W3C standard XML Base
, which describes a mechanism for providing base URI services.
This document describes a mechanism for providing base URI services to XLink, but as a modular specification so that other XML applications benefiting from additional control over relative URIs but not built upon XLink can also make use of it. The syntax consists of a single XML attribute named xml:base. Prepared by:
The deployment of XML Base is through normative reference by new specifications, for example XLink and the XML Infoset. Applications and specifications built upon these new technologies will natively support XML Base. The behavior of xml:base attributes in applications based on specifications that do not have direct or indirect normative reference to XML Base is undefined.
This specification does not attempt to specify which text strings in a document are to be interpreted as URIs. That is the responsibility of each XML vocabulary. The question addressed by this specification is: given a relative URI in an XML document, what base URI is it resolved against?