To add an attribute group to your message model:
Switch to the Enterprise Service Tools perspective.
In the Outline view, right-click the Groups folder, then clickAdd Attribute Group . An attribute group is added to your message model and is assigned a default name.
Either type a new name for the attribute group or press Enter to accept the default.
You can now configure the attribute group to your requirements. For further information on configuring message model objects see Configuring message model objects.