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The closest you can come is by using the same trick XML Namespaces uses to
specify the namespace of an attribute: By adding another attribute.
External Unparsed Entities can be viewed as a named association between a
URI and a Notation. Since we all know that a URI can represent nearly
anything, you simply devise a representation of the "sibling attribute named
<!ENTITY bar-is-a-string SYSTEM "URI:LOCAL-ATTRIBUTE:bar" NDATA STRING>
<!ENTITY bar-is-a-int SYSTEM "URI:LOCAL-ATTRIBUTE:bar" NDATA INT>
<!ENTITY bar-is-a-float SYSTEM "URI:LOCAL-ATTRIBUTE:bar" NDATA FLOAT>
bar CDATA #IMPLIED
local_types ENTITIES #IMPLIED
This, admittedly, is a declaration-heavy mechanism, and somewhat of a hack.
>From: Arjun Ray <email@example.com>
>Subject: Re: [xml-dev] Datatypes - it's in the contract
>Date: Sun, 29 Sep 2002 06:02:25 +0000
>John Cowan <firstname.lastname@example.org> wrote:
>| Jeni Tennison scripsit:
>|> I gather that you couldn't use notations to specify the type of
>| Not any way I know of.
>Not in XML. But it's possible in SGML, using the DATA declared value.
> <!ATTLIST foo
> bar DATA baz #IMPLIED
>where the DATA keyword is followed by the name of a declared notation.
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