[xacml] FW: [XACML Schema] 8-4-2002 minutes

Title: FW: [XACML Schema] 8-4-2002 minutes

Hi,

Looks like Ernesto is still having trouble posting to the list...

Here are the minutes from today's concall.

Carlisle.

----------

From:   ernesto damiani[SMTP:]

Sent:   Monday, April 08, 2002 12:29 PM

To:     Carlisle Adams

Subject:        Fw: [XACML Schema] 8-4-2002 minutes

 

----- Original Message ----- 

From: ernesto damiani 

To:  

Sent: Monday, April 08, 2002 6:06 PM

Subject: [XACML Schema] 8-4-2002 minutes

People:

 

Anne

Carlisle

Tim

Ernesto

Michiharu

Simon

Minutes:

Prior to the concall, Ernesto had posted to the list a proposal for partitioning the current schema among task forces working in parallel. Tim later posted an amendment to that proposal, specifying five areas:  

 

Policy/rule

Obligations

Predicate expressions 

Predicate

Functions

The above list of areas is accepted; Tim volunteers to provide a partition of the current schema elements according to those areas. It is agreed that possible extensions to SAML will be outlined when discussing each area.  

Simon proposes to call the areas "subjects" and to use them as topics for free discussion rather than as names for task-forces.

The proposal is accepted; Ernesto volunteers to assign the subjects to the next three concalls' agendas in order to keep the end of the month deadline. 

Discussion on the mailing list about subjects other than those under discussion in the next concall is however encouraged.

 

It is also decided to leave some time on each concall for discussion of "strategic topics", i.e. general XML schema design issues that are of interest for XACML

 

For the current concall, a brief discussion identifies the following topics:

 

1 use of substitution groups vs type derivation in extensibility points

 

2 need for set-oriented operators 

 

3 definition of an abstract type for each concrete type

 

4 definition of unique element names for schema each position, avoiding tag reuse.

 

Topic 1: While type derivation is favored, it is decided not to adopt a strict guideline of using substitution groups or type derivation as extensibility support. Current substitution groups in the schema are considered well justified.

 

Topic 2: Union and intersection operators will be added in the operators' substitution group

 

Topic 3 and 4: Simon volunteers to carry out an analysis of the current schema to pinpoint places where abstract type definitions could be made. Also, he will look into unique element names.