Re: [Simple] Questions on draft-ietf-simple-filter-format-05

[Hisham Khartabil <hisham.khartabil at telio.no>]

On Nov 14, 2005, at 7:13 PM, Goix Walter wrote:

> Hi,
>
> I have a couple of questions regarding the handling on <exclude> 
> filters in an Event Server:
>
> - when only an <exclude> filter is present (no <include>), does the 
> server need to provide the *whole* document but the excluded part, or 
> is it implicit? In other words, do the server need an <include> filter 
> as well to consider the whole document or part of it before to apply 
> the <exclude> filter?

The draft states

"   The <exclude> element is used to define exceptions to the set of XML
   elements and/or attributes selected by the <include> elements."

So having an <exclude> without an <include> seems to be semantically 
wrong.

> - when the <exclude> filter asks for removing a mandatory element, 
> which is nesting elements from another namespaces, what would be the 
> result of the exclusion process: is it the full content of the 
> mandatory element, or only an 'empty' (or minimally valid) element. 
> Below is an example:
>
> 1. <foo> is a mandatory element within <root> with an <any> only, i.e. 
> it does not have any attribute nor mandate any sub-element
> 2. document in the server is:
> <root>
> <foo>
> <o:bar>something</o:bar>
> </foo>
> </root>
>
> 3. filter contains
> <exclude>
> //root/foo
> </exclude>
>
> 4. Result of filtering process is
> (a)
> <root>
> <foo></foo>
> </root>
>
> or (b)
> <root>
> <foo>
> <o:bar>something</o:bar>
> </foo>
> </root>
> ?

(b) is the choice.

From the draft

"if
   the step in applying the <exclude> element value to an XML document
   results in an invalid document according to the schema, that step
   MUST be reveresed resulting in the elements and/or attributes being
   re-introduced into the resulting XML document, with their previous
   values, in order to make it valid."

Thanks,
Hisham

> Thanks for the clarification
> Walter
>
>
> Gruppo Telecom Italia - Direzione e coordinamento di Telecom Italia 
> S.p.A.
>
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