Extended Link Example

<?xml version="1.0"?>
<xlink:group xmlns:xlink="http://www.w3.org/XML/XLink/0.9">
  <xlink:document href="week1/index.xml"/>
  <xlink:document href="week2/index.xml"/>
  <xlink:document href="week3/index.xml"/>
  <xlink:document href="week4/index.xml"/>
  <xlink:document href="week5/index.xml"/>
  <xlink:document href="week6/index.xml"/>
  <xlink:document href="week7/index.xml"/>
  <xlink:document href="week8/index.xml"/>
  <xlink:document href="week9/index.xml"/>
  <xlink:document href="week10/index.xml"/> 
  <xlink:document href="week11/index.xml"/> 
  <xlink:document href="week12/index.xml"/>
  <xlink:document href="week13/index.xml"/>
</xlink:group>