You are looking at the HTML representation of the WDDX 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 WDDX format, set format=wddx.
See the complete documentation, or API help for more information.
<?xml version="1.0"?>
<wddxPacket version="1.0">
 <header/>
 <data>
    <struct>
      <var name="query">
        <struct>
          <var name="namespaces">
            <struct>
              <var name="-2">
                <struct>
                  <var name="id">
                    <number>-2</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>Media</string>
                  </var>
                  <var name="canonical">
                    <string>Media</string>
                  </var>
                </struct>
              </var>
              <var name="-1">
                <struct>
                  <var name="id">
                    <number>-1</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>Special</string>
                  </var>
                  <var name="canonical">
                    <string>Special</string>
                  </var>
                </struct>
              </var>
              <var name="0">
                <struct>
                  <var name="id">
                    <number>0</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string />
                  </var>
                  <var name="content">
                    <string />
                  </var>
                </struct>
              </var>
              <var name="1">
                <struct>
                  <var name="id">
                    <number>1</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>Talk</string>
                  </var>
                  <var name="subpages">
                    <string />
                  </var>
                  <var name="canonical">
                    <string>Talk</string>
                  </var>
                </struct>
              </var>
              <var name="2">
                <struct>
                  <var name="id">
                    <number>2</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>User</string>
                  </var>
                  <var name="subpages">
                    <string />
                  </var>
                  <var name="canonical">
                    <string>User</string>
                  </var>
                </struct>
              </var>
              <var name="3">
                <struct>
                  <var name="id">
                    <number>3</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>User talk</string>
                  </var>
                  <var name="subpages">
                    <string />
                  </var>
                  <var name="canonical">
                    <string>User talk</string>
                  </var>
                </struct>
              </var>
              <var name="4">
                <struct>
                  <var name="id">
                    <number>4</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>Monoskop</string>
                  </var>
                  <var name="subpages">
                    <string />
                  </var>
                  <var name="canonical">
                    <string>Project</string>
                  </var>
                </struct>
              </var>
              <var name="5">
                <struct>
                  <var name="id">
                    <number>5</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>Monoskop talk</string>
                  </var>
                  <var name="subpages">
                    <string />
                  </var>
                  <var name="canonical">
                    <string>Project talk</string>
                  </var>
                </struct>
              </var>
              <var name="6">
                <struct>
                  <var name="id">
                    <number>6</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>File</string>
                  </var>
                  <var name="canonical">
                    <string>File</string>
                  </var>
                </struct>
              </var>
              <var name="7">
                <struct>
                  <var name="id">
                    <number>7</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>File talk</string>
                  </var>
                  <var name="subpages">
                    <string />
                  </var>
                  <var name="canonical">
                    <string>File talk</string>
                  </var>
                </struct>
              </var>
              <var name="8">
                <struct>
                  <var name="id">
                    <number>8</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>MediaWiki</string>
                  </var>
                  <var name="subpages">
                    <string />
                  </var>
                  <var name="canonical">
                    <string>MediaWiki</string>
                  </var>
                </struct>
              </var>
              <var name="9">
                <struct>
                  <var name="id">
                    <number>9</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>MediaWiki talk</string>
                  </var>
                  <var name="subpages">
                    <string />
                  </var>
                  <var name="canonical">
                    <string>MediaWiki talk</string>
                  </var>
                </struct>
              </var>
              <var name="10">
                <struct>
                  <var name="id">
                    <number>10</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>Template</string>
                  </var>
                  <var name="canonical">
                    <string>Template</string>
                  </var>
                </struct>
              </var>
              <var name="11">
                <struct>
                  <var name="id">
                    <number>11</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>Template talk</string>
                  </var>
                  <var name="subpages">
                    <string />
                  </var>
                  <var name="canonical">
                    <string>Template talk</string>
                  </var>
                </struct>
              </var>
              <var name="12">
                <struct>
                  <var name="id">
                    <number>12</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>Help</string>
                  </var>
                  <var name="subpages">
                    <string />
                  </var>
                  <var name="canonical">
                    <string>Help</string>
                  </var>
                </struct>
              </var>
              <var name="13">
                <struct>
                  <var name="id">
                    <number>13</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>Help talk</string>
                  </var>
                  <var name="subpages">
                    <string />
                  </var>
                  <var name="canonical">
                    <string>Help talk</string>
                  </var>
                </struct>
              </var>
              <var name="14">
                <struct>
                  <var name="id">
                    <number>14</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>Category</string>
                  </var>
                  <var name="canonical">
                    <string>Category</string>
                  </var>
                </struct>
              </var>
              <var name="15">
                <struct>
                  <var name="id">
                    <number>15</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>Category talk</string>
                  </var>
                  <var name="subpages">
                    <string />
                  </var>
                  <var name="canonical">
                    <string>Category talk</string>
                  </var>
                </struct>
              </var>
              <var name="102">
                <struct>
                  <var name="id">
                    <number>102</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>Property</string>
                  </var>
                  <var name="canonical">
                    <string>Property</string>
                  </var>
                </struct>
              </var>
              <var name="103">
                <struct>
                  <var name="id">
                    <number>103</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>Property talk</string>
                  </var>
                  <var name="subpages">
                    <string />
                  </var>
                  <var name="canonical">
                    <string>Property talk</string>
                  </var>
                </struct>
              </var>
              <var name="104">
                <struct>
                  <var name="id">
                    <number>104</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>Type</string>
                  </var>
                  <var name="canonical">
                    <string>Type</string>
                  </var>
                </struct>
              </var>
              <var name="105">
                <struct>
                  <var name="id">
                    <number>105</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>Type talk</string>
                  </var>
                  <var name="subpages">
                    <string />
                  </var>
                  <var name="canonical">
                    <string>Type talk</string>
                  </var>
                </struct>
              </var>
              <var name="108">
                <struct>
                  <var name="id">
                    <number>108</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>Concept</string>
                  </var>
                  <var name="canonical">
                    <string>Concept</string>
                  </var>
                </struct>
              </var>
              <var name="109">
                <struct>
                  <var name="id">
                    <number>109</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>Concept talk</string>
                  </var>
                  <var name="canonical">
                    <string>Concept talk</string>
                  </var>
                </struct>
              </var>
              <var name="250">
                <struct>
                  <var name="id">
                    <number>250</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>Page</string>
                  </var>
                  <var name="canonical">
                    <string>Page</string>
                  </var>
                </struct>
              </var>
              <var name="251">
                <struct>
                  <var name="id">
                    <number>251</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>Page talk</string>
                  </var>
                  <var name="canonical">
                    <string>Page talk</string>
                  </var>
                </struct>
              </var>
              <var name="252">
                <struct>
                  <var name="id">
                    <number>252</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>Index</string>
                  </var>
                  <var name="canonical">
                    <string>Index</string>
                  </var>
                </struct>
              </var>
              <var name="253">
                <struct>
                  <var name="id">
                    <number>253</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>Index talk</string>
                  </var>
                  <var name="canonical">
                    <string>Index talk</string>
                  </var>
                </struct>
              </var>
              <var name="274">
                <struct>
                  <var name="id">
                    <number>274</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>Widget</string>
                  </var>
                  <var name="canonical">
                    <string>Widget</string>
                  </var>
                </struct>
              </var>
              <var name="275">
                <struct>
                  <var name="id">
                    <number>275</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>Widget talk</string>
                  </var>
                  <var name="subpages">
                    <string />
                  </var>
                  <var name="canonical">
                    <string>Widget talk</string>
                  </var>
                </struct>
              </var>
            </struct>
          </var>
        </struct>
      </var>
    </struct>
 </data>
</wddxPacket>