You are looking at the HTML representation of the XML format.
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.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <querypage qpoffset="10" />
  </query-continue>
  <query>
    <querypage name="Ancientpages">
      <results>
        <page value="20150320125651" timestamp="2015-03-20T12:56:51Z" ns="0" title="PXV:IPXC AuditCallback" />
        <page value="20150320125652" timestamp="2015-03-20T12:56:52Z" ns="0" title="PXV:IPXC AuditCallback ChangePropWeight" />
        <page value="20150320125653" timestamp="2015-03-20T12:56:53Z" ns="0" title="PXV:IPXC AuditCallback PutProgressPos" />
        <page value="20150320125654" timestamp="2015-03-20T12:56:54Z" ns="0" title="PXV:IPXC AuditCallback SetProgressMax" />
        <page value="20150320125809" timestamp="2015-03-20T12:58:09Z" ns="0" title="PXV:IPXC Clip" />
        <page value="20150320125810" timestamp="2015-03-20T12:58:10Z" ns="0" title="PXV:IPXC Clip RemoveCurrentItem" />
        <page value="20150320125811" timestamp="2015-03-20T12:58:11Z" ns="0" title="PXV:IPXC Clip NextItem" />
        <page value="20150421091216" timestamp="2015-04-21T09:12:16Z" ns="0" title="PXV:tagPOINTF" />
        <page value="20150521141610" timestamp="2015-05-21T14:16:10Z" ns="0" title="PXV:AFS Enumerations" />
        <page value="20150521141630" timestamp="2015-05-21T14:16:30Z" ns="0" title="PXV:PXS Interfaces" />
      </results>
    </querypage>
  </query>
</api>