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<?xml version="1.0" encoding="UTF-8"?>
<!-- File: xlinks.xsd -->
<schema targetNamespace="http://www.w3.org/1999/xlink" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2001/XMLSchema" xmlns:xsd="http://www.w3.org/2001/XMLSchema" version="2.0">
<annotation>
<appinfo source="urn:opengis:specification:gml:schema-xlinks:v3.0c2">xlinks.xsd v3.0b2 2001-07</appinfo>
<documentation>
GML 3.0 candidate xlinks schema. Copyright (c) 2001 OGC, All Rights Reserved.
</documentation>
</annotation>
<!-- ==============================================================
global declarations
=============================================================== -->
<!-- locator attribute -->
<attribute name="href" type="anyURI"/>
<!-- semantic attributes -->
<attribute name="role" type="anyURI"/>
<attribute name="arcrole" type="anyURI"/>
<attribute name="title" type="string"/>
<!-- behavior attributes -->
<attribute name="show">
<annotation>
<documentation>
The 'show' attribute is used to communicate the desired presentation
of the ending resource on traversal from the starting resource; it's
value should be treated as follows:
new - load ending resource in a new window, frame, pane, or other
presentation context
replace - load the resource in the same window, frame, pane, or
other presentation context
embed - load ending resource in place of the presentation of the
starting resource
other - behavior is unconstrained; examine other markup in the
link for hints
none - behavior is unconstrained
</documentation>
</annotation>
<simpleType>
<restriction base="string">
<enumeration value="new"/>
<enumeration value="replace"/>
<enumeration value="embed"/>
<enumeration value="other"/>
<enumeration value="none"/>
</restriction>
</simpleType>
</attribute>
<attribute name="actuate">
<annotation>
<documentation>
The 'actuate' attribute is used to communicate the desired timing
of traversal from the starting resource to the ending resource;
it's value should be treated as follows:
onLoad - traverse to the ending resource immediately on loading
the starting resource
onRequest - traverse from the starting resource to the ending
resource only on a post-loading event triggered for
this purpose
other - behavior is unconstrained; examine other markup in link
for hints
none - behavior is unconstrained
</documentation>
</annotation>
<simpleType>
<restriction base="string">
<enumeration value="onLoad"/>
<enumeration value="onRequest"/>
<enumeration value="other"/>
<enumeration value="none"/>
</restriction>
</simpleType>
</attribute>
<!-- traversal attributes -->
<attribute name="label" type="string"/>
<attribute name="from" type="string"/>
<attribute name="to" type="string"/>
<!-- ==============================================================
Attributes grouped by XLink type, as specified in the W3C
Proposed Recommendation (dated 2000-12-20)
============================================================== -->
<attributeGroup name="simpleLink">
<attribute name="type" type="string" fixed="simple" form="qualified"/>
<attribute ref="xlink:href" use="optional"/>
<attribute ref="xlink:role" use="optional"/>
<attribute ref="xlink:arcrole" use="optional"/>
<attribute ref="xlink:title" use="optional"/>
<attribute ref="xlink:show" use="optional"/>
<attribute ref="xlink:actuate" use="optional"/>
</attributeGroup>
<attributeGroup name="extendedLink">
<attribute name="type" type="string" fixed="extended" form="qualified"/>
<attribute ref="xlink:role" use="optional"/>
<attribute ref="xlink:title" use="optional"/>
</attributeGroup>
<attributeGroup name="locatorLink">
<attribute name="type" type="string" fixed="locator" form="qualified"/>
<attribute ref="xlink:href" use="required"/>
<attribute ref="xlink:role" use="optional"/>
<attribute ref="xlink:title" use="optional"/>
<attribute ref="xlink:label" use="optional"/>
</attributeGroup>
<attributeGroup name="arcLink">
<attribute name="type" type="string" fixed="arc" form="qualified"/>
<attribute ref="xlink:arcrole" use="optional"/>
<attribute ref="xlink:title" use="optional"/>
<attribute ref="xlink:show" use="optional"/>
<attribute ref="xlink:actuate" use="optional"/>
<attribute ref="xlink:from" use="optional"/>
<attribute ref="xlink:to" use="optional"/>
</attributeGroup>
<attributeGroup name="resourceLink">
<attribute name="type" type="string" fixed="resource" form="qualified"/>
<attribute ref="xlink:role" use="optional"/>
<attribute ref="xlink:title" use="optional"/>
<attribute ref="xlink:label" use="optional"/>
</attributeGroup>
<attributeGroup name="titleLink">
<attribute name="type" type="string" fixed="title" form="qualified"/>
</attributeGroup>
<attributeGroup name="emptyLink">
<attribute name="type" type="string" fixed="none" form="qualified"/>
</attributeGroup>
</schema>
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