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Re: APPEL and the dataschema element

From: Giles Hogben <giles.hogben@jrc.it>
Date: Mon, 1 Oct 2001 17:34:57 +0200
Message-ID: <008e01c14a8e$a05fd110$162abf8b@pcdsa22>
To: "Lorrie Cranor" <lorrie@research.att.com>, "p3pdev" <www-p3p-dev@w3.org>
So basically everything works ok still as long as you disallow inline
schemas from APPEL?
But this seems to cause a serious problem for the APPEL matching algorithm

Here is an example of what I mean:

RULESET
========
 <DATA-GROUP base="mycustomschema.xml" appel:connective="or">
        <DATA category="online"/>
      </DATA-GROUP>

EVIDENCE
========
<DATA-GROUP base="" appel:connective="or">
        <DATA ref="#user.home.online.email"/>
        <DATA ref="#user.home.online.uri"/>
        <DATA ref="#user.business.online.email"/>
        <DATA ref="#user.business.online.uri"/>
        <DATA ref="#dynamic.cookies" category="online"/>
        <DATA ref="#dynamic.miscdata" category="online"/>
      </DATA-GROUP>


Although the ruleset and the evidence may be referring to the same external
schema, the matching algorithm ( APPEL 5.5.2 ) will fail on the <DATA-GROUP>
element.

Or am I missing something?









----- Original Message -----
From: "Lorrie Cranor" <lorrie@research.att.com>
To: "Giles Hogben" <giles.hogben@jrc.it>; "p3pdev" <www-p3p-dev@w3.org>
Sent: Monday, October 01, 2001 5:18 PM
Subject: Re: APPEL and the dataschema element


>
> > But in the previous scenario, this was not necessary - the custom data
> > schemas could simply be parsed out of the input.
>
> Only if they were in the same file. We already had the option
> of putting them in a separate file.
>
> > So is this is a change which needs to be noted in the APPEL spec?
>
> In general, the APPEL spec needs more documentation on
> handling SCHEMA stuff.
>
> > Also - here is another question. When it comes to "category expansion"
> > (APPEL spec 5.4.6) , is it possible that the data-group element in the
> APPEL
> > ruleset could refer to an inline or external schema which would then be
> > needed to expand the category?
> > Or are you saying that
> > a. APPEL rulesets never include any of the data schemas they refer to
> > b. Category expansion can only ever take place over the p3p base data
> > schema?
>
> We are saying that in order to do category expansion, you have
> to have the corresponding data schema. It is not sufficient to
> expand only the base data schema. You have to get whatever
> other schemas are necessary so that you can expand everything.
>
> Lorrie
>
>
Received on Monday, 1 October 2001 11:34:10 GMT

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