[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: XML Schemas: Best Practices
Richard Lanyon <rgl@d...> writes: > On Wed, 20 Sep 2000, Roger L. Costello wrote: > > [introduction to elementFormDefault="unqualified" snipped] > > > Here's an example of a conforming instance document: > > > > <?xml version="1.0"?> > > <my:camera xmlns:my="http://www.camera.org" > > xmlns:xsi="http://www.w3.org/1999/XMLSchema-instance" > > xsi:schemaLocation= "http://www.camera.org Camera.xsd"> > > <body>Ergonomically designed casing for easy handling</body> > > <lens>300mm zoom, 1.2 f-stop</lens> > > <manual_adaptor>1/10,000 sec to 100 sec</manual_adaptor> > > <my:camera> > > Isn't there a problem here? > A document author may well see a document like the above and > try and rewrite it using a default namespace, thus: > > <?xml version="1.0"?> > <camera xmlns="http://www.camera.org"> > <body>Stuff</body> > <lens>More stuff</lens> > <manual_adaptor>Even more stuff</manual_adaptor> > </camera> > > Except (assuming I understand this correctly, which is far from > guaranteed) that won't validate, because body, lens and manual_adaptor > are now qualified and in the wrong namespace. I'd suggest this is far > from intuitive for a document author, unless he/she knows how the > schema works, and the whole idea is that the author should be > insulated from the complexities of the schema. Your analysis is correct. Unqualified local elements and default namespace declarations don't mix well. ht -- Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh W3C Fellow 1999--2001, part-time member of W3C Team 2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440 Fax: (44) 131 650-4587, e-mail: ht@c... URL: http://www.ltg.ed.ac.uk/~ht/
|
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
|