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RE: Schema development for information design & authoring

  • From: "Michael Kay" <mike@s...>
  • To: <ka.aly@l...>,<xml-dev@l...>
  • Date: Wed, 9 Jan 2008 19:53:55 -0000

RE:  Schema development for information design & authoring
I'm reminded of a questionnaire that went round my college asking "do you think there is a demand for a photographic darkroom?" (you can tell my age). To which I responded, "I don't know, why not do a survey to find out?". The point being, no-one has a bird's eye view of the market, especially in an area where so many tools are free; you can only find out what's happening across the board by asking people what they are doing individually, and aggregating the results: you can't find out (with any level of reliability) by asking people what their opinion of the big picture is.
I see extensive use of XML Schema and DTDs, perhaps with a bias towards XSDL in data-oriented work and DTDs in document-oriented applications. I have to say that I have heard an immense amount of talk about Relax NG and Schematron (and much praise for both of them) but have very rarely seen either used in anger. But my worm's eye view may be completely wrong.
As well as data validation, XML Schema is of course widely used in data binding applications. Schema-aware XSLT and XQuery processing, however, is still in its infancy - those who use it recognize the value in speeding up the development cycle, but those who don't tend not to realise what they are missing.
Michael Kay

From: Khaled Aly [mailto:ka.aly@l...]
Sent: 09 January 2008 12:13
To: xml-dev@l...
Subject: Schema development for information design & authoring


With a more general modeling background in a number of other aspects, I'm a newcomer to "formal" information design and data modeling.

I'm interested in learning more about the business merit and application areas of schema development to the last. I could see that DTDs, and more recently RELAX NG and Schematron, are being used for industry standard XML-based authoring applications; but that's mostly a one-time per.

I'm wondering about the business case magnitude/
significance of  schema development for purpose of information development & design, documentation, and content management.

Is it relatively true that the prominent merit is in the area of controlling data exchange for eCommerce and Web Services?

Thank you very much for any insight.


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