W3C home > Mailing lists > Public > public-p3p-spec@w3.org > July 2005

Re: Data Schema Stuff

From: Lorrie Cranor <lorrie@cs.cmu.edu>
Date: Wed, 13 Jul 2005 09:23:34 -0400
Message-Id: <d282c068236f5d03659b652d8e4d6cc4@cs.cmu.edu>
Cc: Rigo Wenning <rigo@w3.org>, Giles Hogben <giles.hogben@jrc.it>
To: 'public-p3p-spec' <public-p3p-spec@w3.org>

In P3P 1.0 the base data schema definition includes all the category 
information and the human-readable strings, so a user agent is able to 
read it one file and have all that information. It would be nice if 
both the categories and strings could be preserved as they are a 
normative part of the spec, and user agents may use them (for example 
Privacy Bird gets all of that information from the base data schema 
file). Also, if someone defines a new data schema with elements not in 
the base data schema, how will they indicate the categories?

Another issue, how do you distinguish between elements that belong to 
multiple categories, and variable-category elements that could belong 
to any category depending on what is said in the policy?

Lorrie


On Jul 12, 2005, at 3:48 PM, giles.hogben@jrc.it wrote:

> I've thought out more fully how my proposal for categories would work 
> using XSD, and I have a proposal for further simlification which I'd 
> like your thoughts on:
>
> First note that categories are NOT used in P3P policies except with 
> dynamic.miscdata and dynamic cookies elements therefore they have no 
> meaning in a policy schema except for these elements. However the aim 
> is that rules (e.g. APPEL) agents can use them to match broad groups 
> of data elements. So what I'm thinking now is that instead of messing 
> up the schema with the category assignments which are never used by 
> the policy, we could do as follows:
>
> 1. In the XSD schema, have only the categories that are used - so it 
> would basically look like the tree in B.  below:
> This would have no problems with backward compatibility whatsoever and 
> would achieve the desired simplification.
> The elements would look like:
> <navigation><dynamic><miscdata/></dynamic></navigation>
> OR
> <user><home-info><postal><name/></postal></home-info></user>
>
>
> 2. We add a separate categories XML file which is NOT an XSD schema 
> but defines which categories an APPEL like system may associate with 
> which data elements in a policy (**or we could even leave it up to an 
> APPEL spec to do this instead of us, having just a recommendation and 
> example in the spec**). Example of what the file would look like in A. 
> below
>
> The key point to note is that the category assignments for non-dynamic 
> elements are only used by APPEL so there is no need for them to be 
> part of the XSD.
>
> One further small comment is that it makes sense to rename the Name 
> under business to orgname because it has a different substructure. 
> This is the only example of where an element with the same name cannot 
> simply be attached by reference so it makes sense to change it.
>
> Let me know what you think and if you agree, I'll implement it this 
> way,
>
> Regards
>
> Giles
>
> **********************************************************
> A. Category assignment file (NOT an XSD) defines what can be written 
> in an APPEL like rule to match what data elements - the agent would 
> take the LEAF of the policy data element (<name/> in the above) and 
> see which categories it was included in below to see whether it 
> matched the rule.
>
> <navigation>
> 	<dynamic/>
> 	<miscdata/>
> 	<cookies/>
> 	<uri/>
> 	<timestamp/>
> 	<other.httpmethod/>
> 	<other.bytes/>
> 	<other.statuscode/>
> 	<referrer/>
> 	<clickstream/>
> 	<clientevents/>
> </navigation>
> <uniqueid>
> 	<business/>
> 	<user/>
> 	<thirdparty/>
> 	<dynamic/>
> 	<miscdata/>
> 	<cookies/>
> 	<id/>
> 	<password/>
> 	<key/>
> 	<format/>
> 	<login/>
> 	<cert/>
> </uniqueid>
> <online/>
> 	<home-info/>
> 	<business-info/>
> 	<contact-info/>
> 	<computer/>
> 	<dynamic/>
> 	<miscdata/>
> 	<cookies/>
> 	<clickstream/>
> 	<http/>
> 	<hostname/>
> 	<fullip/>
> 	<useragent/>
> </online>
> <interactive>
> 	<dynamic/>
> 	<miscdata/>
> 	<cookies/>
> 	<searchtext/>
> 	<interactionrecord/>
> </interactive>
>
> Etc...
>
> *************************************
> B. Revised tree structure of XSD data schema
> **************************************
>
> datatype
> |
> +navigation
> |	+dynamic
> |		+miscdata
> |		+cookies
> +uniqueid
> |	+dynamic
> |		+miscdata
> |		+cookies
> +demographic
> |	+dynamic
> |		+miscdata
> |		+cookies
> +physical
> |	+dynamic
> |		+miscdata
> |		+cookies
> +online
> |	+dynamic
> |		+miscdata
> |		+cookies
> +computer
> |	+dynamic
> |		+miscdata
> |		+cookies
> +interactive
> |	+dynamic
> |		+miscdata
> |		+cookies
> +dynamic
> |    +clickstream
> |    |  +uri
> |    |  |  +authority
> |    |  |  +stem
> |    |  |  +querystring
> |    |  +timestamp
> |    |  |  +ymd.year
> |    |  |  +ymd.month
> |    |  |  +ymd.day
> |    |  |  +hms.hour
> |    |  |  +hms.minute
> |    |  |  +hms.second
> |    |  |  +fractionsecond
> |    |  |  +timezone
> |    |  +clientip
> |    |  |  +hostname
> |    |  |  +partialhostname
> |    |  |  +fullip
> |    |  |  +partialip
> |    |  +other.httpmethod
> |    |  +other.bytes
> |    |  +other.statuscode
> |    +http
> |    |  +referer
> |    |  |  +authority
> |    |  |  +stem
> |    |  |  +querystring
> |    |  +useragent
> |    +clientevents
> |    +searchtext
> |    +interactionrecord
> |
> +user
> |  +name
> |  |  +prefix
> |  |  +given
> |  |  +middle
> |  |  +family
> |  |  +suffix
> |  |  +nickname
> |  +bdate
> |  |  +ymd.year
> |  |  +ymd.month
> |  |  +ymd.day
> |  |  +hms.hour
> |  |  +hms.minute
> |  |  +hms.second
> |  |  +fractionsecond
> |  |  +timezone
> |  +login
> |  |  +id
> |  |  +password
> |  +cert
> |  |  +key
> |  |  +format
> |  +gender
> |  +jobtitle
> |  +home-info
> |  |  +postal
> |  |  |  +name
> |  |  |  |  +prefix
> |  |  |  |  +given
> |  |  |  |  +middle
> |  |  |  |  +family
> |  |  |  |  +suffix
> |  |  |  |  +nickname
> |  |  |  +street
> |  |  |  +city
> |  |  |  +stateprov
> |  |  |  +postalcode
> |  |  |  +organization
> |  |  |  +country
> |  |  +telecom
> |  |  |  +telephone
> |  |  |  |  +intcode
> |  |  |  |  +loccode
> |  |  |  |  +number
> |  |  |  |  +ext
> |  |  |  |  +comment
> |  |  |  +fax
> |  |  |  |  +intcode
> |  |  |  |  +loccode
> |  |  |  |  +number
> |  |  |  |  +ext
> |  |  |  |  +comment
> |  |  |  +mobile
> |  |  |  |  +intcode
> |  |  |  |  +loccode
> |  |  |  |  +number
> |  |  |  |  +ext
> |  |  |  |  +comment
> |  |  |  +pager
> |  |  |    +intcode
> |  |  |    +loccode
> |  |  |    +number
> |  |  |    +ext
> |  |  |    +comment
> |  |  +online
> |  |    +email
> |  |    +uri
> |  +business-info
> |    +postal
> |    |  +name
> |    |  |  +prefix
> |    |  |  +given
> |    |  |  +middle
> |    |  |  +family
> |    |  |  +suffix
> |    |  |  +nickname
> |    |  +street
> |    |  +city
> |    |  +stateprov
> |    |  +postalcode
> |    |  +organization
> |    |  +country
> |    |telecom
> |    |  +telephone
> |    |  |  +intcode
> |    |  |  +loccode
> |    |  |  +number
> |    |  |  +ext
> |    |  |  +comment
> |    |  +fax
> |    |  |  +intcode
> |    |  |  +loccode
> |    |  |  +number
> |    |  |  +ext
> |    |  |  +comment
> |    |  +mobile
> |    |  |  +intcode
> |    |  |  +loccode
> |    |  |  +number
> |    |  |  +ext
> |    |  |  +ext
> |    |  |  +ext
> |    |  |  +comment
> |    |  +pager
> |    |    +intcode
> |    |    +loccode
> |    |    +number
> |    |    +ext
> |    |    +comment
> |    |online
> |    |  +email
> |    |  +uri
> |    +employer
> |    +department
> +thirdparty
> |  +name
> |  |  +prefix
> |  |  +given
> |  |  +middle
> |  |  +family
> |  |  +suffix
> |  |  +nickname
> |  +bdate
> |  |  +ymd.year
> |  |  +ymd.month
> |  |  +ymd.day
> |  |  +hms.hour
> |  |  +hms.minute
> |  |  +hms.second
> |  |  +fractionsecond
> |  |  +timezone
> |  +login
> |  |  +id
> |  |  +password
> |  +cert
> |  |  +key
> |  |  +format
> |  +gender
> |  +jobtitle
> |  +home-info
> |  |  +postal
> |  |  |  +name
> |  |  |  |  +prefix
> |  |  |  |  +given
> |  |  |  |  +middle
> |  |  |  |  +family
> |  |  |  |  +suffix
> |  |  |  |  +nickname
> |  |  |  +street
> |  |  |  +city
> |  |  |  +stateprov
> |  |  |  +postalcode
> |  |  |  +organization
> |  |  |  +country
> |  |  +telecom
> |  |  |  +telephone
> |  |  |  |  +intcode
> |  |  |  |  +loccode
> |  |  |  |  +number
> |  |  |  |  +ext
> |  |  |  |  +comment
> |  |  |  +fax
> |  |  |  |  +intcode
> |  |  |  |  +loccode
> |  |  |  |  +number
> |  |  |  |  +ext
> |  |  |  |  +comment
> |  |  |  +mobile
> |  |  |  |  +intcode
> |  |  |  |  +loccode
> |  |  |  |  +number
> |  |  |  |  +ext
> |  |  |  |  +comment
> |  |  |  +pager
> |  |  |    +intcode
> |  |  |    +loccode
> |  |  |    +number
> |  |  |    +ext
> |  |  |    +comment
> |  |  +online
> |  |    ?email
> |  |    +uri
> |  +business-info
> |    +postal
> |    |  +name
> |    |  |  +prefix
> |    |  |  +given
> |    |  |  +middle
> |    |  |  +family
> |    |  |  +suffix
> |    |  |  +nickname
> |    |  +street
> |    |  +city
> |    |  +stateprov
> |    |  +postalcode
> |    |  +organization
> |    |  +country
> |    |telecom
> |    |  +telephone
> |    |  |  +intcode
> |    |  |  +loccode
> |    |  |  +number
> |    |  |  +ext
> |    |  |  +comment
> |    |  +fax
> |    |  |  +intcode
> |    |  |  +loccode
> |    |  |  +number
> |    |  |  +ext
> |    |  |  +comment
> |    |  +mobile
> |    |  |  +intcode
> |    |  |  +loccode
> |    |  |  +number
> |    |  |  +ext
> |    |  |  +comment
> |    |  +pager
> |    |    +intcode
> |    |    +loccode
> |    |    +number
> |    |    +ext
> |    |    +comment
> |    +online
> |    |  +email
> |    |  +uri
> |    +employer
> |    +department
> |
> +business
>    +orgname
>    |department
>    +cert
>    |  +key
>    |  +format
>    +contact-info
>      +postal
>      |  +orgname
>      |  +name
>      |  +street
>      |  +city
>      |  +stateprov
>      |  +postalcode
>      |  +organization
>      |  +country
>      +telecom
>        +telephone
>        |  +intcode
>        |  +loccode
>        |  +number
>        |  +ext
>        |  +comment
>        +fax
>        |  +intcode
>        |  +loccode
>        |  +number
>        |  +ext
>        |  +comment
>        +mobile
>        |  +intcode
>        |  +loccode
>        |  +number
>        |  +ext
>        |  +comment
>        +pager
>        |  +intcode
>        |  +loccode
>        |  +number
>        |  +ext
>        |  +comment
>        +online
>          +email
>          +uri
>
>
>
>
Received on Wednesday, 13 July 2005 13:24:07 GMT

This archive was generated by hypermail 2.2.0 + w3c-0.30 : Wednesday, 13 July 2005 13:24:07 GMT