XMI 2.1 export fails to include Not NULL designation

[RonSonntag]

Anyone else run into this? I have exported, using XMI 2.1 (UML 2.x), a physical SQL Server 2012 Class diagram, using Table elements with attributes that have various types, scale, etc. AND Not NULL indicators. When I examine the exported XMI, there is no sign of the NotNULL indicator.

When I import into Erwin, all the Attribute meta-data is there, except for the NotNULL indicator.

[Eve]

I ran an XMI export of a package containing two attributes identical except for the not null field. There was a difference between them in the EA extensions section of the XMI.