Name
xsd:anyURI — URI (Uniform Resource Identifier)
Synopsis
<xsd:simpleType name="anyURI” id="anyURI"> <xsd:restriction base="xsd:anySimpleType"> <xsd:whiteSpace value="collapse” fixed="true"/> </xsd:restriction></xsd:simpleType>
Derived from
xsd:anySimpleType
Primary
xsd:anyURI
Known subtypes
None
Data parameters (facets)
enumeration
, length
,
maxLength
, minLength
,
pattern
Description
This datatype corresponds normatively to the XLink
href
attribute. Its value space includes the URIs
defined by RFCs 2396 and 2732, but its lexical space
doesn’t require the character escapes needed to
include non-ASCII characters in a URIs.
Restrictions
Relative URIs aren’t absolutized by the W3C XML Schema. A pattern defined as:
<data type="xsd:anyURI"> <choice"> <value type="xsd:anyURI">http://www.w3.org/TR/xmlschema-0/</value> <value type="xsd:anyURI">http://www.w3.org/TR/xmlschema-1/</value> <value type="xsd:anyURI">http://www.w3.org/TR/xmlschema-2/</value> </choice> </data>
shouldn’t match the href
attribute in this instance element:
<a xml:base="http://www.w3.org/TR/" href="xmlschema-1/"> XML Schema Part 2: Datatypes </a>
The Recommendation states that “it is impractical for processors to check that a value is a context-appropriate URI reference,” thus freeing schema processors from having to validate the correctness of the URI.
Example
<define name="httpURI"> <data type="xsd:anyURI"> <param name="pattern">http://.*<param> </data> </define>
Get RELAX NG now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.