Re: [xml] Potential wrong usage of xmlIsID() in tree.c

[Daniel Veillard <veillard redhat com>]

On Thu, Feb 23, 2006 at 01:03:24PM +0100, Kasimier Buchcik wrote:
> The problem occurs regardless of a validation being performed or not.
>
> Example:
>
> <!DOCTYPE foo [
>   <!ELEMENT foo (bar)>
>   <!ELEMENT bar>
>   <!ATTLIST bar myId ID #IMPLIED>
> ]>
>
> Assume we parse and validate the following XML:
> <foo>
>   <bar myID="1"/>
> </foo>
>
> The API wouldn't prevent us to add a <bar> to the <bar>:
> <foo>
>   <bar myID="1">
>     <bar/>
>   </bar>
> </foo>
>
> If we now add @myID to the newly created <bar>, then the current
> ID-autodetection would mark it as of type ID:
> <foo>
>   <bar myID="1">
>     <bar myID="2"/>
>   </bar>
> </foo>
>
> The problem I see here, is that the second <bar> is not valid according
> to the DTD, and thus its @myID shouldn't become an ID; that's why

  I think this is wrong. Even if the element raised a validity error, the
IDNESS property of the attribute would still be there.

Daniel

-- 
Daniel Veillard      | Red Hat http://redhat.com/
veillard redhat com  | libxml GNOME XML XSLT toolkit  http://xmlsoft.org/
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