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RE: [xml-dev] IDs without DTD/Schema , Is there a way ?
- From: Michael Brennan <Michael_Brennan@Allegis.com>
- To: 'Tim Bray' <firstname.lastname@example.org>, email@example.com
- Date: Thu, 25 Oct 2001 13:41:53 -0700
Another problem with IDs is that they have document-level scope. Using a
specific global attribute poses problems when XML is used in a modular
fashion, such as with enveloping schemes such as SOAP.
> -----Original Message-----
> From: Tim Bray [mailto:firstname.lastname@example.org]
> Sent: Thursday, October 25, 2001 11:16 AM
> To: email@example.com
> Subject: Re: [xml-dev] IDs without DTD/Schema , Is there a way ?
> At 01:34 AM 25/10/01 -0700, Ronald Bourret wrote:
> >There are only two ways to determine if an attribute is an
> ID attribute:
> >1) From a DTD or XML Schema
> >2) The attribute name is hard-coded in your application
> >You cannot just look at an attribute and decide if it is an ID
> Yes, and this is one of our really big outstanding serious
> architectural problems. It's really important for the
> workings of the web that an address such as
> have well-defined semantics. If foo turns out to be XML,
> this is hopelessly underdefined. At various times James Clark
> and I have both suggested that we just brutally hijack the
> attribute name "id" and assert that it is of DTD type ID.
> Other ideas have included using xml:id or having a reserved
> namespace http://w3.org/xmlid or some such; any attribute
> associated with it is of type ID.
> This one isn't going to go away. -Tim