You are looking at the HTML representation of the XML 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 XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query>
    <allimages>
      <img name="Btn_Bezier.png" timestamp="2013-03-20T13:16:27Z" url="http://sketchchair.cc/wiki/images/f/fe/Btn_Bezier.png" descriptionurl="http://sketchchair.cc/wiki/index.php/File:Btn_Bezier.png" ns="6" title="File:Btn Bezier.png" />
      <img name="Btn_Layer_Delete.png" timestamp="2013-03-20T17:19:02Z" url="http://sketchchair.cc/wiki/images/2/22/Btn_Layer_Delete.png" descriptionurl="http://sketchchair.cc/wiki/index.php/File:Btn_Layer_Delete.png" ns="6" title="File:Btn Layer Delete.png" />
      <img name="Btn_Layer_Guide.png" timestamp="2013-03-20T17:19:03Z" url="http://sketchchair.cc/wiki/images/1/16/Btn_Layer_Guide.png" descriptionurl="http://sketchchair.cc/wiki/index.php/File:Btn_Layer_Guide.png" ns="6" title="File:Btn Layer Guide.png" />
      <img name="Btn_Layer_Mirror.png" timestamp="2013-03-20T17:19:05Z" url="http://sketchchair.cc/wiki/images/3/3c/Btn_Layer_Mirror.png" descriptionurl="http://sketchchair.cc/wiki/index.php/File:Btn_Layer_Mirror.png" ns="6" title="File:Btn Layer Mirror.png" />
      <img name="Btn_Layer_New.png" timestamp="2013-03-20T17:19:03Z" url="http://sketchchair.cc/wiki/images/c/cd/Btn_Layer_New.png" descriptionurl="http://sketchchair.cc/wiki/index.php/File:Btn_Layer_New.png" ns="6" title="File:Btn Layer New.png" />
      <img name="Btn_Layer_SelectAll.png" timestamp="2013-03-20T17:19:04Z" url="http://sketchchair.cc/wiki/images/e/e7/Btn_Layer_SelectAll.png" descriptionurl="http://sketchchair.cc/wiki/index.php/File:Btn_Layer_SelectAll.png" ns="6" title="File:Btn Layer SelectAll.png" />
      <img name="Btn_Slices_Slat.png" timestamp="2013-03-20T17:25:15Z" url="http://sketchchair.cc/wiki/images/7/71/Btn_Slices_Slat.png" descriptionurl="http://sketchchair.cc/wiki/index.php/File:Btn_Slices_Slat.png" ns="6" title="File:Btn Slices Slat.png" />
      <img name="Btn_Slices_Slice.png" timestamp="2013-03-20T17:25:16Z" url="http://sketchchair.cc/wiki/images/6/6d/Btn_Slices_Slice.png" descriptionurl="http://sketchchair.cc/wiki/index.php/File:Btn_Slices_Slice.png" ns="6" title="File:Btn Slices Slice.png" />
      <img name="Btn_Slices_SliceGrp.png" timestamp="2013-03-20T17:25:14Z" url="http://sketchchair.cc/wiki/images/e/e5/Btn_Slices_SliceGrp.png" descriptionurl="http://sketchchair.cc/wiki/index.php/File:Btn_Slices_SliceGrp.png" ns="6" title="File:Btn Slices SliceGrp.png" />
      <img name="Btn_Tools_Bezier.png" timestamp="2013-03-20T13:22:15Z" url="http://sketchchair.cc/wiki/images/a/ad/Btn_Tools_Bezier.png" descriptionurl="http://sketchchair.cc/wiki/index.php/File:Btn_Tools_Bezier.png" ns="6" title="File:Btn Tools Bezier.png" />
    </allimages>
  </query>
  <query-continue>
    <allimages aicontinue="Btn_Tools_Draw.png" />
  </query-continue>
</api>