[dsdl-comment] Re: Once or twice? (NVDL)

On 9/10/07, MURATA Makoto <murata@hokkaido.email.ne.jp> wrote:
> All,
>
> Consider the following NVDL script. Note that there are two validate
> actions. They reference to the same schema.
>
> <rules xmlns="http://purl.oclc.org/dsdl/nvdl/ns/structure/1.0"
> xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0">
> <namespace ns="http://www.example.com">
> <validate schema="foo.rng"/>
> <validate schema="foo.rng"/>
> </namespace>
> </rules>
>
> Are there any implementations that validate the document ONLY ONCE?
> Or, do all implementations valite the document twice?

I think all implementation SHOULD validate it twice, unless they have
very good reason to do so.

I see some case like Dynamically generated schema : If my URL gets a
dynamically generated schema, then those two validations MAY give two
different results

Then on the opposite, I could have

 <rules xmlns="http://purl.oclc.org/dsdl/nvdl/ns/structure/1.0"
   xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0">
     <namespace ns="http://www.example.com">
         <validate schema="foo.rng"/>
         <validate schema="bar.rng"/>
     </namespace>
 </rules>

And nothing prevents me from having foo.rng === bar.rng

So I won't do go this way

Regards,

Mohamed

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