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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.
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<?xml version="1.0"?>
<api>
  <query-continue>
    <allcategories accontinue="Emulátory_pro_Linux" />
  </query-continue>
  <query>
    <allcategories>
      <c size="18" pages="18" files="0" subcats="0" xml:space="preserve">Amiga</c>
      <c size="2" pages="2" files="0" subcats="0" xml:space="preserve">Amiga 500</c>
      <c size="1" pages="1" files="0" subcats="0" xml:space="preserve">Amiga 600</c>
      <c size="1" pages="1" files="0" subcats="0" xml:space="preserve">Apple</c>
      <c size="9" pages="9" files="0" subcats="0" xml:space="preserve">Atari 16 a více bit</c>
      <c size="3" pages="3" files="0" subcats="0" xml:space="preserve">Atari 8bit</c>
      <c size="1" pages="1" files="0" subcats="0" xml:space="preserve">BASIC 1Z-016</c>
      <c size="14" pages="5" files="9" subcats="0" xml:space="preserve">Commodore 8bit</c>
      <c size="1" pages="1" files="0" subcats="0" xml:space="preserve">Dátové typy jazyka BASIC 1Z-016</c>
      <c size="1" pages="1" files="0" subcats="0" xml:space="preserve">Emulátory pro Javu</c>
    </allcategories>
  </query>
</api>