You can specify the properties to be returned for each graph node for Partial query expansions. You specify the property definition and can optionally specify the display name for the property to be returned. For example:
lobjGraphExpansionQuery.AddProperty("+IDEVTag", "Name")
lobjGraphExpansionQuery.AddProperty("+IDEVTag", "Description")
lobjGraphExpansionQuery.AddProperty("+IDEVTag", "DEVWeight", "Weight")