OptionalqSpecifies the class of the group's object members.
One of:
OptionalqSpecifies the type of the group's subgroup members.
OptionalqThe group's label. Will be evaluated as an expression if it starts with '='.
OptionalqThe objects and sub-groups that are members of the group.
OptionalqSpecifies the type of the group's object members.
Defines the properties of an object group.
Stability: experimental