[Zope3-dev] [OT] Re: idea: attr:foo addition to tal

[Stuart Bishop]

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On 25/07/2004, at 1:47 PM, Tonico Strasser wrote:

> Stuart Bishop wrote:
>  > I suspect it is perfectly valid XML (':' is valid in XML
>> names, which is how come they were able to use it for
>> XML namespaces). A quick look at the namespaces spec
>> seems to tell me that the namespace prefix is 'attr' and
>> the attribute name 'xml:lang',
>
> Hello Stuart,
>
> maybe well-formed, but how would you validate it?
>
> In theory we could validate TAL or METAL because we know the 
> attributes in this namespace, but it's impossible to validate a 
> unknown set of attributes.

Not with a DTD. I believe with other mechanisms like XML Schema and
RELAX-NG you can specify 'any attribute' to allow for extensible
file formats.

You can't always validate a page template anyway - it might be
generating XML for which no DTD exists:

<foo tal:content="string:bar" />

- --  
Stuart Bishop <stuart at stuartbishop.net>
http://www.stuartbishop.net/
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