I use ProjectLibre 1.5.1. I saved in xml format a test exercise with task-Resource assignment.

I compared node element Assignment with especification xml microsoft --> "http://msdn.microsoft.com/en-us/library/office/bb968611%28v=office.12%29.aspx". I saw node element /Assignment/UID is a node required to Microsoft but when I save in ProjectLibre don't use these node. Is normal? Can be ProjectLibre use another Microsoft especification?

Regards,