Textual notation of pre-"ref" of "PartDefinition" , "ItemUsage" , etc.

[coldzeraaaaa]

Hey, dear SysML-v2 developers. My sincere thanks and blessings to you all in the first. I am a Java coder researching the generation of text representations through the SysML XML model. These SysML classes that you designed are very good. But , it's also a little complex and makes me confused.

So there is a question bother me for a few days. I use "Save SysML2XMI" configuration to convert my textual notation , I get a XML file of modeling. And I load this XML file into my Eclipse , and then I try to know how to distinguish the pre-"fix" .

A attribute or a law? In the beginning , I think "isReference" is the key of pre-"ref"

But, it's wrong.

Now it cost me two weeks, I really don't know how to do. So I have to ask u here , plz , I really need help....... Thanks if u would like give me some help