Help with XML and UML Class Model

[k7peh]

First:  I am relatively new to both UML modeling and EA.

I am working with a reasonably complex class model, several hundred classes and a myriad of associations.  This is a class model that I have modified from an original version representing a large application.

A subset of the data represented by this class model is to be captured in an XML schema (.xsd).  In a perfect world where peace reigns supreme I would be able to describe my XML schema classes, how those classes relate to the big class model, and how data attributes transform between the class model and the XML schema classes.

What I have done so far is to create new XML Schema (using the XML profile that is downloaded from EA web site) classes but I DO NOT know how to associate a given attribute of an XML schema class with an existing attribute of some other class.  I fear that UML will not allow me to do this.  Also, a given XML schema class is a composite construction of several related classes, that is a few attributes from one class and attributes from a few other classes.  How do I show the association between the XML Schema attributes and the associated attributes of other classes.  Or, is there some standard practice of naming attributes to imply the association.

Can someone start pointing me in the right direction?

-phil-