<!ELEMENT Group (Group|Image|Button|Playlist|Slider|RadialSlider|Text|Checkbox|
Anchor|Video|Playtree|Panel)+>
<!ATTLIST Group
+ id CDATA "none"
x CDATA "0"
y CDATA "0"
>
<!ELEMENT Panel (Group|Image|Button|Playlist|Slider|RadialSlider|Text|Checkbox|
Anchor|Video|Playtree|Panel)+>
<!ATTLIST Panel
+ id CDATA "none"
x CDATA "0"
y CDATA "0"
lefttop CDATA "lefttop"
<!-- Anchors -->
<!ELEMENT Anchor EMPTY>
<!ATTLIST Anchor
+ id CDATA "none"
x CDATA "0"
y CDATA "0"
lefttop CDATA "lefttop"