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>
    <links plcontinue="31327|0|Tagging" />
  </query-continue>
  <query>
    <pages>
      <page pageid="31327" ns="0" title="Main Page">
        <links>
          <pl ns="0" title="Dealing with Ensembles" />
          <pl ns="0" title="Dealing with Mesh or Prim Clothing" />
          <pl ns="0" title="Enabling RLV in Firestorm" />
          <pl ns="0" title="FAQ Wardrobe" />
          <pl ns="0" title="Getting Started" />
          <pl ns="0" title="How RLV Finds Your Items" />
          <pl ns="0" title="Naming Your Folders" />
          <pl ns="0" title="Recommended Additional Tools" />
          <pl ns="0" title="Removing Clothing Before an Outfit Is Put On" />
          <pl ns="0" title="Setting Up Your RLV Folder" />
        </links>
      </page>
    </pages>
  </query>
</api>