3.1.2.21 themes Element
The <themes> element has the following
definition:
<!ELEMENT themes (theme+) >
The <themes> element specifies one or more
<theme> elements (described in theme Element). If you have specified a base map (basemap attribute of the
map_request element), any themes that you specify in a
<themes> element are plotted after those defined in the
base map. If no base map is specified, only the specified themes are rendered.
Inside this <themes> element there must be one or
more <theme> child elements, which are rendered in the order in
which they appear.
Parent topic: Map Request DTD