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/>
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          <var name="namespaces">
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                    <string>first-letter</string>
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                    <string>Media</string>
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                  <var name="canonical">
                    <string>Media</string>
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                    <string>first-letter</string>
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                    <string>Special</string>
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                  <var name="canonical">
                    <string>Special</string>
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                  <var name="case">
                    <string>first-letter</string>
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                  <var name="*">
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                  <var name="subpages">
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                  <var name="content">
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                  <var name="id">
                    <number>1</number>
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                  <var name="case">
                    <string>first-letter</string>
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                  <var name="*">
                    <string>Talk</string>
                  </var>
                  <var name="subpages">
                    <string />
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                  <var name="canonical">
                    <string>Talk</string>
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                  <var name="case">
                    <string>first-letter</string>
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                  <var name="*">
                    <string>User</string>
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                  <var name="subpages">
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                  <var name="canonical">
                    <string>User</string>
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                    <number>3</number>
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                  <var name="case">
                    <string>first-letter</string>
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                  <var name="*">
                    <string>User talk</string>
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                  <var name="subpages">
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                  <var name="canonical">
                    <string>User talk</string>
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                    <number>4</number>
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                  <var name="case">
                    <string>first-letter</string>
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                  <var name="*">
                    <string>Heroes Wiki</string>
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                  <var name="subpages">
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                  <var name="canonical">
                    <string>Project</string>
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              <var name="5">
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                    <number>5</number>
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                  <var name="case">
                    <string>first-letter</string>
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                    <string>Heroes Wiki talk</string>
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                  <var name="subpages">
                    <string />
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                  <var name="canonical">
                    <string>Project talk</string>
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                  <var name="id">
                    <number>6</number>
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                  <var name="case">
                    <string>first-letter</string>
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                  <var name="*">
                    <string>File</string>
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                  <var name="canonical">
                    <string>File</string>
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                </struct>
              </var>
              <var name="7">
                <struct>
                  <var name="id">
                    <number>7</number>
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                  <var name="case">
                    <string>first-letter</string>
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                  <var name="*">
                    <string>File talk</string>
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                  <var name="subpages">
                    <string />
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                  <var name="canonical">
                    <string>File talk</string>
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                  <var name="id">
                    <number>8</number>
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                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>MediaWiki</string>
                  </var>
                  <var name="canonical">
                    <string>MediaWiki</string>
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                </struct>
              </var>
              <var name="9">
                <struct>
                  <var name="id">
                    <number>9</number>
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                  <var name="case">
                    <string>first-letter</string>
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                  <var name="*">
                    <string>MediaWiki talk</string>
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                  <var name="subpages">
                    <string />
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                  <var name="canonical">
                    <string>MediaWiki talk</string>
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                </struct>
              </var>
              <var name="10">
                <struct>
                  <var name="id">
                    <number>10</number>
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                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>Template</string>
                  </var>
                  <var name="canonical">
                    <string>Template</string>
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                </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>
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                </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="canonical">
                    <string>Help</string>
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                </struct>
              </var>
              <var name="13">
                <struct>
                  <var name="id">
                    <number>13</number>
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                  <var name="case">
                    <string>first-letter</string>
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                    <string>Help talk</string>
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                  <var name="subpages">
                    <string />
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                  <var name="canonical">
                    <string>Help talk</string>
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              </var>
              <var name="14">
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                  <var name="id">
                    <number>14</number>
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                  <var name="case">
                    <string>first-letter</string>
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                  <var name="*">
                    <string>Category</string>
                  </var>
                  <var name="canonical">
                    <string>Category</string>
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                </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>
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                  <var name="subpages">
                    <string />
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                  <var name="canonical">
                    <string>Category talk</string>
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                </struct>
              </var>
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                <struct>
                  <var name="id">
                    <number>100</number>
                  </var>
                  <var name="case">
                    <string>first-letter</string>
                  </var>
                  <var name="*">
                    <string>Episode</string>
                  </var>
                  <var name="subpages">
                    <string />
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                  <var name="canonical">
                    <string>Episode</string>
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                  <var name="content">
                    <string />
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                </struct>
              </var>
              <var name="101">
                <struct>
                  <var name="id">
                    <number>101</number>
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                  <var name="case">
                    <string>first-letter</string>
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                  <var name="*">
                    <string>Episode talk</string>
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                  <var name="subpages">
                    <string />
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                  <var name="canonical">
                    <string>Episode talk</string>
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                </struct>
              </var>
              <var name="102">
                <struct>
                  <var name="id">
                    <number>102</number>
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                  <var name="case">
                    <string>first-letter</string>
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                  <var name="*">
                    <string>Graphic Novel</string>
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                  <var name="subpages">
                    <string />
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                  <var name="canonical">
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                  <var name="content">
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                  <var name="id">
                    <number>103</number>
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                  <var name="case">
                    <string>first-letter</string>
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                    <string>Graphic Novel talk</string>
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                  <var name="canonical">
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                  <var name="id">
                    <number>104</number>
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                    <string>first-letter</string>
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                  <var name="canonical">
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                  <var name="content">
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                  <var name="id">
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                    <string>first-letter</string>
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                  <var name="canonical">
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                  <var name="id">
                    <number>106</number>
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                  <var name="case">
                    <string>first-letter</string>
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                    <string>Interview</string>
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                  <var name="subpages">
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                  <var name="canonical">
                    <string>Interview</string>
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                  <var name="content">
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                  <var name="case">
                    <string>first-letter</string>
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                    <string>Interview talk</string>
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                </struct>
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                <struct>
                  <var name="id">
                    <number>108</number>
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                  <var name="case">
                    <string>first-letter</string>
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                  <var name="*">
                    <string>Theory</string>
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                  <var name="subpages">
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                    <string>Theory</string>
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                  <var name="id">
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                    <string>first-letter</string>
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                    <string>Webisode</string>
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                    <string>Fan Creation talk</string>
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                </struct>
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        </struct>
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    </struct>
 </data>
</wddxPacket>