13.4 Linkbases

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13.4 Linkbases

A linkbase is a document containing a set of inbound and external-party links
A linkbase supports the principle of separating markup from content. It permits flexible arrangements of inter-linked resources, without having to edit the resources themselves.

<article xmlns:xlink="http://www.w3.org/1999/xlink"
         xlink:type ="extended">
  <toc     xlink:type ="locator" xlink:href="toc.xml"
           xlink:label="toc"/>
  <section xlink:type="locator" xlink:href="sec1.xml"
           xlink:label="sec"/>
  <section xlink:type="locator" xlink:href="sec2.xml"
           xlink:label="sec"/>
  <section xlink:type="locator" xlink:href="sec3.xml"
           xlink:label="sec"/>
  <entries   xlink:type="arc" from="toc" to="sec"/>
</article>
<article xmlns:xlink="http://www.w3.org/1999/xlink"
         xlink:type ="extended">
  <section xlink:type="locator" xlink:href="sec1.xml"
           xlink:label="sec1"/>
  <section xlink:type="locator" xlink:href="sec2.xml"
           xlink:label="sec2"/>
  <section xlink:type="locator" xlink:href="sec3.xml"
           xlink:label="sec3"/>
  <next xlink:type="arc" xlink:from="sec1"  xlink:to="sec2"/>
  <next xlink:type="arc" xlink:from="sec2"  xlink:to="sec3"/>
  <prev xlink:type="arc" xlink:from="sec2"  xlink:to="sec1"/>
  <prev xlink:type="arc" xlink:from="sec3"  xlink:to="sec2"/>
</article>

An arcrole attribute with the value http://www.w3.org/1999/xlink/properties/linkbase can be used to externally associate a linkage with a document.

<basesloaded xmlns:xlink="http://www.w3.org/1999/xlink"
             xlink:type="extended" >
   <startrsrc xlink:type  = "locator"
              xlink:label = "spec"
              xlink:href  = "spec.xml" />
   <linkbase xlink:type  = "locator"
             xlink:label = "linkbase"
             xlink:href  = "linkbase.xml" />
   <load   xlink:type    = "arc"
           xlink:from    = "spec"
           xlink:to      = "linkbase"
           xlink:arcrole=
              "http://www.w3.org/1999/xlink/properties/linkbase"
           xlink:actuate="onLoad" />
</basesloaded>

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