- From: Henry S. Thompson <ht@inf.ed.ac.uk>
- Date: Fri, 07 Jan 2005 14:44:35 +0000
- To: Tom Moog <tmoog@sarvega.com>
- Cc: Michael Kay <mike@saxonica.com>, xmlschema-dev@w3.org
So in DTD notation, which is easier to work with in cases like this, your original is ( (admin, error?)* , deviceTypeInfo*, error? ) I fear this is effectively equivalent to the known-to-be-inexpressable in a valid DTD content model chess-game problem, i.e. (w, b)* , w? If the semantics are as they appear to be (I'm just guessing), the most appropriate solution is to introduce a wrapper: ( (admin, error?)* , extra? ) extra: ( deviceTypeInfo*, error? ) ht -- Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh Half-time member of W3C Team 2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440 Fax: (44) 131 650-4587, e-mail: ht@inf.ed.ac.uk URL: http://www.ltg.ed.ac.uk/~ht/ [mail really from me _always_ has this .sig -- mail without it is forged spam]
Received on Friday, 7 January 2005 14:44:43 UTC