add given edg graph valid add edg graph assum associ gener extend includ depend add own element model em need work em ad edg own element model namespac implicitli make visibl namespac param edg edg ad graph overrid add edg object edg edg illeg argument except add edg dest port edg sourc port edg illeg argument except sourc dest port provid edg defin log lp log granular type statement lp log local nest ifdef usecasediagram log info enabl log info ad edg type edg us diagram endif add edg edg defin log lp log granular type statement lp log local lp log local nest ifdef usecasediagram log info attempt add edg reject endif add element place namespac model edg add edg todo assum model facad auml element edg model facad namespac edg model core helper add own element home model edg tell gef edg ad edg 