[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Restrictions on existence of attributes?
Stan Kitsis wrote: > In my experience API-level support is an order (or two) of magnitude more expensive than delivering UI apps. First of all, the testing costs are much higher. Second (and way more significant), once we realease an API, we will have to support it for 10 years or so - and this is extremely expensive. > I hadn't heard that applications with User Interfaces were so cheap and easy to deliver. Or that supplying a third-party developed and maintained library consisting of, say, two or three methods, and documented by existing XPath documentation, an ISO standard, material in multiple books, and many web articles, would be "extremely expensive". In fact, I was once told that MS used Schematron as part of their regression testing for MSXML's XSLT implementation, so I suspect supplying Schematron might in fact be even easier for MS to do than it might be for your competitors. You might even see it a way of monetizing your regression tests! :-) And I think customers would respond positively to MS and other vendors supporting ISO Schematron, because it both fills a common and constant need and because it increasingly is being adopted in government and industry standards. Schematron is moving from being the secret weapon of system developers, such as freight companies and legal publishers, to being the way that organizations and consortia who are serious about interoperability specify executable constraints with user-focused diagnostics. To see where people are going with Schematron, here are three interesting sets of pages: "Schematron pushes the right buttons" on ACORD and Lloyds bank http://www.lloyds.com/News_Centre/Features_from_Lloyds/Schematron_pushes_the_right_buttons.htm and http://www.marketreform.co.uk/Documents/Claims_pubs/London_Market_Implementation_of_ACORD_DRI_Messages.pdf especially note section 4.3 NIST's Open Vulnerability and Assessment Language (OVAL) http://oval.mitre.org/language/download/schema/index.html has a draft ISO Schematron schema at time of writing that is almost half a meg in size! IBM's Business Information Conformance Statements (BICS), see http://www-128.ibm.com/developerworks/library/specification/x-bics20/BICSspec_v2.0.htm Cheers Rick Jelliffe
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