The topicgroup element identifies a group of topics (such as a concepts, tasks, or references) or other resources. A topicgroup can contain other topicgroup elements, allowing you to express navigation or table-of-contents hierarchies, as well as implying relationships between the containing topicgroup and its children. You can set the collection-type of a container topicgroup to determine how its children are related to each other. Relationships end up expressed as links in the output (with each participant in a relationship having links to the other participants by default).
A topic group may be inserted both from the toolbar action and the contextual node actions.
By using the Insert Topic Group dialog you can easily insert a topicgroup element. The Type, Format, Scope and Collection type attributes can be specified from the dialog.