You can create a group particle from the Toolbox or from the property sheet of an element, group, or complex type.
Select the Sequence, Choice, or All tool in the Toolbox, and click an element, complex type, group, or group particle.
Open the property sheet of an element, group, or complex type, select a Group type on the General tab, and click OK. The element symbol displays a plus sign on its right side that you can click to reveal the group particle.
Open the property sheet of a group particle, click the Items tab, and use the Add Group Particle tool.
For information about creating children under the group particle, see Constructing Schemas in an XSL.
For general information about creating objects, see Core Features Guide > Modeling with PowerDesigner > Objects.