Ian Stokes-Rees <ijs@decisionsoft.com> writes: <snip/> -- I'll address the general question in another message. > Perhaps I can better serve the discussion by providing the explicit > example in question (see below). I would say that this is an illegal > ACM as you cannot identify from the single token "startDate" whether you > are in theh first sequence (startDate, endDate) or the second sequence > (startDate, duration). > > Do others believe this type definition is legal or illegal? Violates UPA, for sure. The DTD equivalent, i.e. ((s,e)?|(s,d)?|(d,e)?) is also disallowed. > Can anyone suggest a reasonable way to achieve the desired constraint? Sure -- ((s,(d|e))|(d,e))? ht -- Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh W3C Fellow 1999--2002, 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@cogsci.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 Thursday, 13 June 2002 04:13:46 GMT
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