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union of enumerated values for subtypes

From: Stanley Guan <stanley.guan@oracle.com>
Date: Fri, 01 Mar 2002 09:44:32 -0800
Message-ID: <3C7FBE00.BEC90560@oracle.com>
To: schema-ig w3c <w3c-xml-schema-ig@w3.org>, Schema XML <xmlschema-dev@w3.org>

   Schema Representation Constraint: Simple Type Restriction (Facets)

    R - which restrict another simple type definition (B)
    S - R's {facets}

    The {facets} of R are the union of S and the {facets} of B, eliminating duplicates.
    To eliminate duplicates, when a facet of the same kind occurs in both S and the
    {facets} of B, the one in the {facts} of B is not included, with the exception
    of enumeration and pattern facets, for which multiple occurrences with distinct
    values are allowed.

Is the above description for enumeration wrong?  In the description, it seems to
me the {facets} of R, a subtype of B, will have more choices (i.e., enumerated
values) allowed than B does, which is a contradiction to what a subtype means.

Am I right?


Received on Friday, 1 March 2002 12:44:49 UTC

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