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Jeff Rafter <lists@j...> writes:
. . .
> In XSV and Xerces keys and keyrefs apparently treat simple ur-type and
> xs:string the same
Because the REC says they can [1]:
"Values of differing type can only be equal if one type is derived
from the other, and the value is in the value space of both."
combined with [2]:
"The mapping from lexical space to value space is unspecified for
items whose type definition is the *simple ur-type
definition*. Accordingly this specification does not constrain
processors' behaviour in areas where this mapping is implicated, for
example checking such items against enumerations, constructing
default attributes or elements whose declared type definition is the
*simple ur-type definition*, checking identity constraints involving
such items."
ht
[1] http://www.w3.org/TR/xmlschema-1/#Identity-constraint_Definition_details
[2] http://www.w3.org/TR/xmlschema-1/#Simple_Type_Definition
--
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/
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