[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Were these derived from a logical data model: XSLT, XML Sc
On Sun, Mar 16, 2008 at 07:51:33AM -0400, Costello, Roger L. wrote: > I am interested in knowing if these XML vocabularies -- XSLT, XML > Schema, XHTML, Schematron -- were developed by first creating a logical > data model. XPath 2.0, XSLT 2.0 and XQuery 2.0 do use a logical (abstract) data model to describe XML. It is not a traditional entity-relational diagram as you depicted: those are oftn used when designing a schema, but not so often when designing a schema language. So... > I wonder how often people designing XML vocabularies follow that > methodology? Yes, or something like it, and have done for many years. Atlas Consulting (or was it Atlas) published one such methodology; Microstar had another. > I wonder if XSLT, XML Schema, XHTML and Schematron were > developed by following that methodology? > > DERIVED FROM A LOGICAL DATA MODEL? > > 1. XSLT: the XSLT specification [1] describes an XML vocabulary that > can be used to create a stylesheet. It describes what tags can be used > and the meaning of each tag, i.e., how an XSLT-aware application will > behave when it encounters each XSLT element. No. XSLT describes what *elements* can be used; it is not defined at the lexical level of start and end tags. But, XSLT 2 is built on a logical data model, although not one described in terms of relational algebra. Liam -- Liam Quin, W3C XML Activity Lead, http://www.w3.org/People/Quin/ http://www.holoweb.net/~liam/ * http://www.fromoldbooks.org/
[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] |
PURCHASE STYLUS STUDIO ONLINE TODAY!Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced! Download The World's Best XML IDE!Accelerate XML development with our award-winning XML IDE - Download a free trial today! Subscribe in XML format
|