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Empty attributes

From: Olivier Lefevre <lefevrol@yahoo.com>
Date: Wed, 19 Oct 2005 03:05:40 +0200
To: xmlschema-dev@w3.org
Message-ID: <dj465d$f6s$1@sea.gmane.org>

any DTD-focused newsgroup or mailing list.

I have an XML file in which some attributes are set to
"", e.g., <entry id="4" type=""> and cannot find any
way to allow this in the DTD. The DTD specifies a list
of possible values for type and if I try to add "" to
the list, e.g., by writing <!ENTITY % type "(foo|bar|)">,
the parser complains that "the name token is required in
the enumerated type list for the "type" attribute
declaration.". Similarly if I try to make the attribute
implied rather than required I still get the error that
"" is not a valid value for the type attribute (I naively
thought that an empty attribute might be equated to a
missing one). So I am really stumped. Are empty attributes
possible at all?

FWIW the parser used is XOM, which uses Xerces2 underneath.
Received on Wednesday, 19 October 2005 07:43:04 UTC

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