[teiid-designer-dev] sql/xml functions

See https://jira.jboss.org/jira/browse/TEIID-171. With the next milestone there will be new SQL/XML functions. The impact to Designer should be limited, and will mostly be in the DisplayNode logic. The is because the xmlelement function does not have standard function syntax. And there are also the xmlattributes and xmlforest functions, that are actually implemented with a new expression type. You can see the formal definition of these functions in the SQL2003 spec. Let me know who to follow up to get support into Designer. Steve