[wg11] P21 e3 DIS testing - status update

Fri Jun 27 06:08:03 EDT 2014

All,

Here is a quick status report on the four projects. Each of the projects 
has its own ftp sub-directory that includes a README file with a fuller 
description of the project.

ftp://www.steptools.com/private/P21e3_DIS_testing           (try 
ftp.steptools.com if www.steptools.com does not work for you)

1. Digital signatures

Status
--------
a. We have updated the signature code to only make one section for each 
signature (previous version spit the signature, key and certificate into 
three sections).
b. We have updated the signature algorithm to ignore characters that are 
not in the P21 character set
c. We have create a server and some example files to enable wider 
testing (see README).

Issues and Opportunities
----------------------------------
a. Can we extend the signatures to assist in the management of data 
networks?
b. If a signed file references another file and the signature of the 
referenced file is invalid does that mean the signature of the 
referencing file is also invalid?
c. NIST has a project called Product-Lifecyle-Of-Trust (PLOT) that may 
be able to help us with further development and testing (see README 
directory for one-page overview).

2. ZIP Assemblies

Status
--------
a. We have created the first example of a computer generated ZIP 
Assembly file (see README)

Issues and Opportunities
----------------------------------
a. There are many files called "ISO-10303-21.txt" in the ZIP which has 
the potential to cause data management and confusion issues.
b. Do we need to define a signature algorithm for ZIP files?
c. Should the next stage be to create an e3 file for the PDM in the 
assembly?

3. Units

Status
--------
a. Extensive discussions have shown that the definition of units is 
jealously guarded between the ISO committees and (perhaps as a result) 
the URN's created for the standard units
     are somewhat complex - for example urn:iso:std:iso:31:term:metre

Issues and Opportunities
----------------------------------
a. W3C has loosened the requirements for URN's so we may be able to 
define unit URNs just for Part 21 e3 files - for example urn:p21:metre
b. Do we want to use URN's to define other types of repetitive STEP 
entities such as the APPLICATION_PROTOCOL_DEFINITION entity instance 
e.g.  urn:step:AP242
c. Are fancy URN's with query parameters allowed? If so then we may be 
able to use these to define date-times and similar repetitive entity sets

Martin

-------- Original Message --------
Subject: 	[wg11] Reminder: P21e3 Testing webconf on Friday
Date: 	Thu, 26 Jun 2014 14:31:46 -0400
From: 	David Loffredo <loffredo at steptools.com>
Organization: 	STEP Tools, Inc.
To: 	wg11 at steptools.com

Hi everyone, just a quick reminder about the P21e3 testing webconf
scheduled for tomorrow.   Details are below.

					- Dave

-------- Original Message --------
Subject: 	[wg11] Meeting invitation: P21e3 Testing
Date: 	Thu, 5 Jun 2014 15:43:51 +0000 (GMT)
From: 	David Loffredo <messenger at webex.com>
Reply-To: 	loffredo at steptools.com
To: 	wg11 at steptools.com

Hello ,

David Loffredo invites you to attend this online meeting.

Topic: P21e3 Testing
Date: Friday, June 27, 2014
Time: 10:00 am, Eastern Daylight Time (New York, GMT-04:00)
Meeting Number: 956 406 113
Meeting Password: (This meeting does not require a password.)

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