You are looking at the HTML representation of the YAML format.
HTML is good for debugging, but probably is not suitable for your application.
See complete documentation, or API help for more information. 
---
query:
  namespaces:
    -
      id: -2
      case: first-letter
      '*': Media
      canonical: Media
    -
      id: -1
      case: first-letter
      '*': Special
      canonical: Special
    -
      id: 0
      case: first-letter
      '*':
      content:
    -
      id: 1
      case: first-letter
      '*': Talk
      subpages:
      canonical: Talk
    -
      id: 2
      case: first-letter
      '*': User
      subpages:
      canonical: User
    -
      id: 3
      case: first-letter
      '*': User talk
      subpages:
      canonical: User talk
    -
      id: 4
      case: first-letter
      '*': Tapestries MUCK
      canonical: Project
    -
      id: 5
      case: first-letter
      '*': Tapestries MUCK talk
      subpages:
      canonical: Project talk
    -
      id: 6
      case: first-letter
      '*': File
      canonical: File
    -
      id: 7
      case: first-letter
      '*': File talk
      subpages:
      canonical: File talk
    -
      id: 8
      case: first-letter
      '*': MediaWiki
      subpages:
      canonical: MediaWiki
    -
      id: 9
      case: first-letter
      '*': MediaWiki talk
      subpages:
      canonical: MediaWiki talk
    -
      id: 10
      case: first-letter
      '*': Template
      canonical: Template
    -
      id: 11
      case: first-letter
      '*': Template talk
      subpages:
      canonical: Template talk
    -
      id: 12
      case: first-letter
      '*': Help
      canonical: Help
    -
      id: 13
      case: first-letter
      '*': Help talk
      subpages:
      canonical: Help talk
    -
      id: 14
      case: first-letter
      '*': Category
      canonical: Category
    -
      id: 15
      case: first-letter
      '*': Category talk
      subpages:
      canonical: Category talk
    -
      id: 90
      case: first-letter
      '*': Thread
      canonical: Thread
    -
      id: 91
      case: first-letter
      '*': Thread talk
      canonical: Thread talk
    -
      id: 92
      case: first-letter
      '*': Summary
      canonical: Summary
    -
      id: 93
      case: first-letter
      '*': Summary talk
      canonical: Summary talk
    -
      id: 100
      case: first-letter
      '*': Character
      canonical: Character
    -
      id: 101
      case: first-letter
      '*': Character Talk
      canonical: Character Talk
    -
      id: 102
      case: first-letter
      '*': Location
      canonical: Location
    -
      id: 103
      case: first-letter
      '*': Location Talk
      canonical: Location Talk