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HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
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<?xml version="1.0"?>
<api>
  <query-continue>
    <querypage qpoffset="10" />
  </query-continue>
  <query>
    <querypage name="Ancientpages">
      <results>
        <page value="20090318223536" timestamp="2009-03-18T22:35:36Z" ns="0" title="Circulaire du 30 mars 1998" />
        <page value="20090318223536" timestamp="2009-03-18T22:35:36Z" ns="0" title="Conseil d&#039;État - 117948" />
        <page value="20090318223536" timestamp="2009-03-18T22:35:36Z" ns="0" title="Conseil d&#039;État - 287394" />
        <page value="20090318223536" timestamp="2009-03-18T22:35:36Z" ns="0" title="Conseil d&#039;État - 282703" />
        <page value="20090318223537" timestamp="2009-03-18T22:35:37Z" ns="0" title="Conseil d&#039;État - 297553" />
        <page value="20090318223537" timestamp="2009-03-18T22:35:37Z" ns="0" title="Conseil d&#039;État - 85416" />
        <page value="20090318223537" timestamp="2009-03-18T22:35:37Z" ns="0" title="Conseil d&#039;État - 89253" />
        <page value="20090318223540" timestamp="2009-03-18T22:35:40Z" ns="0" title="Ordonnance du 1er juin 1828 Sur les conflits d&#039;attribution" />
        <page value="20090318223540" timestamp="2009-03-18T22:35:40Z" ns="0" title="Ordonnance du 12 mars 1831" />
        <page value="20090318223541" timestamp="2009-03-18T22:35:41Z" ns="0" title="JO-S - 28 avril 2000 - Mise en place des 35 heures à La Poste" />
      </results>
    </querypage>
  </query>
</api>