xml schema visualization

[JMan]

Hello,
I am looking for a tool to visualize an xsd file. I tried
xmlspy,xmlschemaagent,eclipse,visual studio,netbeans,liquid xml. All
of them can't show inheritance hierarchies. What i want is a tree view
with my abstract types at the root and all the extending types in the
knots and leaves, like in a UML-classdiagramm. Does anybody know such
a tool?

thanks, Johannes