- Kendall.ppt is from http://metadataopenforum.org/download.php?dcbda16e069c619010a39352a99df138
- gupta-jpa.html from http://www.oracle.com/technology/pub/articles/gupta-jpa.html


- Benoit Marchal (bmarchal@pineapplesoft.com), "Working XML: UML, XMI, and code generation"
articles about code generation from UML/XMI with XSLT: 
  . http://www.ibm.com/developerworks/xml/library/x-wxxm23/
  . http://www.ibm.com/developerworks/xml/library/x-wxxm24/
  . http://www.ibm.com/developerworks/library/x-wxxm25/
  
  
- XMI specification: http://www.omg.org/docs/formal/07-12-01.pdf  

- VO ontology results in volute: http://code.google.com/p/volute/downloads/list