You are looking at the HTML representation of the DBG 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 DBG format, set format=dbg.
See the complete documentation, or API help for more information.
array (
  'query' => 
  array (
    'namespaces' => 
    array (
      -2 => 
      array (
        'id' => -2,
        'case' => 'first-letter',
        '*' => 'Media',
        'canonical' => 'Media',
      ),
      -1 => 
      array (
        'id' => -1,
        'case' => 'first-letter',
        '*' => 'Special',
        'canonical' => 'Special',
      ),
      0 => 
      array (
        'id' => 0,
        'case' => 'first-letter',
        '*' => '',
        'content' => '',
      ),
      1 => 
      array (
        'id' => 1,
        'case' => 'first-letter',
        '*' => 'Talk',
        'subpages' => '',
        'canonical' => 'Talk',
      ),
      2 => 
      array (
        'id' => 2,
        'case' => 'first-letter',
        '*' => 'User',
        'subpages' => '',
        'canonical' => 'User',
      ),
      3 => 
      array (
        'id' => 3,
        'case' => 'first-letter',
        '*' => 'User talk',
        'subpages' => '',
        'canonical' => 'User talk',
      ),
      4 => 
      array (
        'id' => 4,
        'case' => 'first-letter',
        '*' => '2628Climator',
        'subpages' => '',
        'canonical' => 'Project',
      ),
      5 => 
      array (
        'id' => 5,
        'case' => 'first-letter',
        '*' => '2628Climator talk',
        'subpages' => '',
        'canonical' => 'Project talk',
      ),
      6 => 
      array (
        'id' => 6,
        'case' => 'first-letter',
        '*' => 'File',
        'canonical' => 'File',
      ),
      7 => 
      array (
        'id' => 7,
        'case' => 'first-letter',
        '*' => 'File talk',
        'subpages' => '',
        'canonical' => 'File talk',
      ),
      8 => 
      array (
        'id' => 8,
        'case' => 'first-letter',
        '*' => 'MediaWiki',
        'subpages' => '',
        'canonical' => 'MediaWiki',
      ),
      9 => 
      array (
        'id' => 9,
        'case' => 'first-letter',
        '*' => 'MediaWiki talk',
        'subpages' => '',
        'canonical' => 'MediaWiki talk',
      ),
      10 => 
      array (
        'id' => 10,
        'case' => 'first-letter',
        '*' => 'Template',
        'canonical' => 'Template',
      ),
      11 => 
      array (
        'id' => 11,
        'case' => 'first-letter',
        '*' => 'Template talk',
        'subpages' => '',
        'canonical' => 'Template talk',
      ),
      12 => 
      array (
        'id' => 12,
        'case' => 'first-letter',
        '*' => 'Help',
        'subpages' => '',
        'canonical' => 'Help',
      ),
      13 => 
      array (
        'id' => 13,
        'case' => 'first-letter',
        '*' => 'Help talk',
        'subpages' => '',
        'canonical' => 'Help talk',
      ),
      14 => 
      array (
        'id' => 14,
        'case' => 'first-letter',
        '*' => 'Category',
        'canonical' => 'Category',
      ),
      15 => 
      array (
        'id' => 15,
        'case' => 'first-letter',
        '*' => 'Category talk',
        'subpages' => '',
        'canonical' => 'Category talk',
      ),
      100 => 
      array (
        'id' => 100,
        'case' => 'first-letter',
        '*' => 'project01',
        'canonical' => 'project01',
      ),
      101 => 
      array (
        'id' => 101,
        'case' => 'first-letter',
        '*' => 'project01 talk',
        'canonical' => 'project01 talk',
      ),
      102 => 
      array (
        'id' => 102,
        'case' => 'first-letter',
        '*' => 'project02',
        'canonical' => 'project02',
      ),
      103 => 
      array (
        'id' => 103,
        'case' => 'first-letter',
        '*' => 'project02 talk',
        'canonical' => 'project02 talk',
      ),
      104 => 
      array (
        'id' => 104,
        'case' => 'first-letter',
        '*' => 'project03',
        'canonical' => 'project03',
      ),
      105 => 
      array (
        'id' => 105,
        'case' => 'first-letter',
        '*' => 'project03 talk',
        'canonical' => 'project03 talk',
      ),
      106 => 
      array (
        'id' => 106,
        'case' => 'first-letter',
        '*' => 'project04',
        'canonical' => 'project04',
      ),
      107 => 
      array (
        'id' => 107,
        'case' => 'first-letter',
        '*' => 'project04 talk',
        'canonical' => 'project04 talk',
      ),
      108 => 
      array (
        'id' => 108,
        'case' => 'first-letter',
        '*' => 'project05',
        'canonical' => 'project05',
      ),
      109 => 
      array (
        'id' => 109,
        'case' => 'first-letter',
        '*' => 'project05 talk',
        'canonical' => 'project05 talk',
      ),
      110 => 
      array (
        'id' => 110,
        'case' => 'first-letter',
        '*' => 'project06',
        'canonical' => 'project06',
      ),
      111 => 
      array (
        'id' => 111,
        'case' => 'first-letter',
        '*' => 'project06 talk',
        'canonical' => 'project06 talk',
      ),
      112 => 
      array (
        'id' => 112,
        'case' => 'first-letter',
        '*' => 'project07',
        'canonical' => 'project07',
      ),
      113 => 
      array (
        'id' => 113,
        'case' => 'first-letter',
        '*' => 'project07 talk',
        'canonical' => 'project07 talk',
      ),
      114 => 
      array (
        'id' => 114,
        'case' => 'first-letter',
        '*' => 'project08',
        'canonical' => 'project08',
      ),
      115 => 
      array (
        'id' => 115,
        'case' => 'first-letter',
        '*' => 'project08 talk',
        'canonical' => 'project08 talk',
      ),
      200 => 
      array (
        'id' => 200,
        'case' => 'first-letter',
        '*' => 'UserWiki',
        'canonical' => 'UserWiki',
      ),
      201 => 
      array (
        'id' => 201,
        'case' => 'first-letter',
        '*' => 'UserWiki talk',
        'canonical' => 'UserWiki talk',
      ),
      202 => 
      array (
        'id' => 202,
        'case' => 'first-letter',
        '*' => 'User profile',
        'canonical' => 'User profile',
      ),
      203 => 
      array (
        'id' => 203,
        'case' => 'first-letter',
        '*' => 'User profile talk',
        'canonical' => 'User profile talk',
      ),
      310 => 
      array (
        'id' => 310,
        'case' => 'first-letter',
        '*' => 'Shared',
        'canonical' => 'Shared',
      ),
      311 => 
      array (
        'id' => 311,
        'case' => 'first-letter',
        '*' => 'Shared talk',
        'canonical' => 'Shared talk',
      ),
    ),
  ),
)