Re: [Simple] XML schema for presence rules documents

ext Mircea Amarascu wrote:
> Hello,
>
> I have a question regarding the XML Schema that validates the presence 
> rules documents, schema
> defined in Section 6 of draft-ietf-simple-presence-rules-09
>
> Because XML Schema allows any global element to be a document root 
> element for a document that can be valid against the schema, it 
> results that documents like:
>
> <?xml version="1.0" encoding="UTF-8"?>
> <provide-place-is 
> xmlns="urn:ietf:params:xml:ns:pres-rules">true</provide-place-is>
>
> are valid, though meaningless in regards to a complete presence rules 
> document containing conditions, actions and transformations sections.
>
> I could:
>
> 1. Validate the document against both presence rules and common policy 
> schemas, but that's inefficient.
> 2. Validate the document against the presence rules schema and then 
> check its root element is a "ruleset" one.
>
> Is there something that I miss here ?
>
> Thank you.
No, you are not missing anything here. The tool is just deficient. Even 
for describing content models it has quite many other shortcomings as 
well. But if you need to do runtime checks (which is not that 
self-evident either) you'd better use other tools, like relax, but then 
you need also those schemas. Alternatively, you could write also better 
combination schemas with w3c/xml schema, but there would still be some 
deficiency anyhow.
br, jari

_______________________________________________
Simple mailing list
Simple@ietf.org
https://www1.ietf.org/mailman/listinfo/simple