[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Key constraint on optional attribute
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Paul Popiel writes: > is there anyway of placing a key constraint on an optional attribute? That's what 'unique' constraints are for -- not required to be present, but required to be unique _when_ present. If that's not what you meant, more details of your document type and requirements are needed. . . 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@i... URL: http://www.ltg.ed.ac.uk/~ht/ [mail really from me _always_ has this .sig -- mail without it is forged spam] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (GNU/Linux) iD8DBQFDe0vtkjnJixAXWBoRAi67AJwJ8AEMS1ejCIgZ2/JWxJJ1AW0z3gCfV63L xzyDbYfuzjHeYebihk1q2kM= =ytKW -----END PGP SIGNATURE-----
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