Hi,
I tried to export this little class to XMI 2.1:

This XMI-File was created (extensions are deleted):
<?xml version="1.0" encoding="windows-1252"?>
<xmi:XMI xmi:version="2.1" xmlns:uml="http://schema.omg.org/spec/UML/2.1" xmlns:xmi="http://schema.omg.org/spec/XMI/2.1">
<xmi:Documentation exporter="Enterprise Architect" exporterVersion="6.5"/>
<uml:Model xmi:type="uml:Model" name="EA_Model" visibility="public">
<packagedElement xmi:type="uml:Package" xmi:id="0E386949_8A20" name="Model" visibility="public">
<packagedElement xmi:type="uml:Package" xmi:id="9E7BD7F4_027C" name="Class Model" visibility="public">
<packagedElement xmi:type="uml:Class" xmi:id="179A3583_6AE1" name="$help://classdiagram.htm" visibility="public"/>
<packagedElement xmi:type="uml:Class" xmi:id="29A94BBC_1192_" name="$help://class_model_pattern.htm" visibility="public"/>
<packagedElement xmi:type="uml:Package" xmi:id="B3FA55F1_7650" name="System" visibility="public">
<packagedElement xmi:type="uml:Class" xmi:id="15CBBC74_D2FD" name="Class1" visibility="public">
<ownedAttribute xmi:type="uml:Property" xmi:id="E7064343_2190" name="aBooleanVariable" visibility="private"
isDerived="false">
<lowerValue xmi:type="uml:LiteralInteger" xmi:id="LI000001_2190" value="1"/>
<upperValue xmi:type="uml:LiteralInteger" xmi:id="LI000002_2190" value="1"/>
</ownedAttribute>
<ownedAttribute xmi:type="uml:Property" xmi:id="4F116335_17B5" name="aDoubleVariable" visibility="private"
isDerived="false">
<lowerValue xmi:type="uml:LiteralInteger" xmi:id="LI000003_17B5" value="1"/>
<upperValue xmi:type="uml:LiteralInteger" xmi:id="LI000004_17B5" value="1"/>
</ownedAttribute>
<ownedOperation xmi:id="43BDD403_3700" name="operation1" visibility="public" concurrency="sequential">
<ownedParameter xmi:id="B948AAF9_124B" name="x" direction="in"/>
<ownedParameter xmi:id="7E68882C_4CAA" name="y" direction="in"/>
</ownedOperation>
</packagedElement>
</packagedElement>
</packagedElement>
</packagedElement>
</uml:Model>
<xmi:Extension extender="Enterprise Architect" extenderID="6.5">
[deleted]
</xmi:Extension>
</xmi:XMI>
Well, where are the informations about the parameter and attribute types? Is it my failure or doesn't XMI 2.1 store the informations by specification?
The longer I try to export different models to XMI, the more elements and bugs I can find. That's depressing

Perhaps, it would be a good idea to open a thread to collect all bugs of the XMI-Exporter?
Edit: I reduced the length of the IDs and inserted spaces.