Subject: RE: Review of thoughts on Ad Hoc Queries
Message text written by "email@example.com" >+++++++++++++++++++++++++++++++++++++++++++++ The query syntax DOES NOT prescribe the implementation! +++++++++++++++++++++++++++++++++++++++++++++ I don't think we can have a meaningful vote until everyone takes a deep breath and lets this sink in. OR - does anyone actually still believe that the syntax DOES prescribe the implementation? If so, please explain. <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Joe, That bit I agree with. However this - I do not agree that the query syntax itself is benign. Here in lies the rub. The more the query syntax allows - the more this forces the backend implementation (whatever) to have to jump thru hoops to achieve, and then by extension - the more likely you are that different implementations will give inconsistent results. Even with SQL databases you see this! (I have the scars to prove it!). Further more - since this is ebXML - my premise would be that the default is a XML based query syntax of some form as most of the content can be expected to be XML too. Therefore I expect to use your query 'as is' - not having to morph it at all - and that way you get more exact precision and ability to support the family of XML (schema, RDF, XSLT, and so on down the list). Therefore - in selecting a simple XML based system I am significantly shortening the pieces of string for most vendors and users. This is the multiplier that XML brings. Tools are written to support XML, the registry is implemented in the tools. You know how to use XML tehcniques so there is nothing new to learn. That also just makes less extensions people need to develop and longer term enhances your ability to take advantage of new XML based goodies as they come along. DW.
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