Article:		Modeling XML Vocabularies with UML: Part II
Subject:		Limitations of a small example
Date:		2001-09-27 12:15:02
From:		Dave Carlson
Response to: Not a good article
When using a simple example like this purchase order schema, it's often easy to conclude that you would be better off simply writing the XML schema in a text editor. The use of a UML model adds more complexity than the value that you gain. However, the real benefit of using UML becomes more apparent in large, complex schema design projects. That's why I generally prefer to use a larger vocabulary design (like my Catalog Markup Language example) to illustrate the role of object-oriented modeling with XML schema design. I also see very significant value from using UML to reverse engineer existing XML schema specifications, e.g. UDDI, FpML, xCBL, etc. In these cases, a picture is indeed worth a thousand words in the specification. Regards, Dave Carlson

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