groups
The root element of a layout-group
publication resource. It contains a sequence of group
elements defining all the groups that are to be
available for a publication's section pages. It may also contain
a sequence of content-type-group
elements
referring to a list of existing content-type names, which can be used
by the allow-content-types
element of an
area
of a group.
Syntax
<groups> <group>...</group>+ <content-type-group>...</content-type-group>* </groups>