[step-manufacturing] Minutes of Part 21 Edition 3 Pre-DIS Review

[Martin Hardwick]

  Minutes of Part 21 Edition 3 Pre-DIS Review


    Monday June 3, 2013


    AFNOR, Paris, France


    Attendees

Allison Bernard Feeney, NIST, USA

Alexandre Fournier, Boost-Conseil, France

Jochen Haenisch, EPM, Norway

Martin Hardwick, STEP Tools, USA

Mikael Hedlind, KTH, Sweden

Keith Hunten, Lockheed Martin, USA

Lothar Klein, LKSoft, Germany

Ed Paff, ITI, USA

Max Ungerer, ProSTEP, Germany

Martin Hardwick gave a brief overview of the goals of the new edition.

http://www.steptools.com/library/standard/p21e3_dis_preview.pptx

The team then discussed the latest draft of the new edition.

http://www.steptools.com/library/standard/p21e3_dis_preview.html

The team resolved to make the following edits and submit the document 
for Draft International Standard (DIS) review.

1.The ISO-10303-21.txt directory file should be required to have the 
extension ".p21" instead of ".txt" to conform to an SC4 resolution on 
file extension names.

2.An informative annex should be added to describe the file extension 
names recommended by SC4.

3.The CAX-IF recommends using PKZIP algorithm 2.05 for compression but 
the current draft recommends using 2.04 so check if there is any difference.

4.Annex A.4 should include a reference to the normative document for the 
ZIP algorithm.

5.Because of security concerns a Part 21 file must not reference an 
ECMAScript file so remove the ECMAScript_population entity from the 
Schema header

6.Entity instance names must be numeric in case applications infer 
meaning from alpha-numeric names so return the entity instance naming to 
the Edition 2 rules and change all the examples to conform to this standard.

7.Delete the BNF for TAG from Table 3 and remove Sections 9.2 and 10.4.

8.Make the distinction between entity instance names and literal 
instance names clear by giving the latter a name that begins with the 
'@' symbol.

9.Extend the syntax to allow a literal instance to be defined from an 
EXPRESS constant. For example

@10 = MATHEMATICAL_FUNCTIONS_SCHEMA.THE_NEG_PI_INTERVAL;

10.To avoid security concerns delete all examples that use URI query 
strings.

11.Change the definition for implicit anchors so that numeric anchor 
names are assumed to be references to entity instances with that entity 
id number.

12.Verify that the Byte Order Mark (BOM) is not necessary for UTF-8.

13.In Section 12.1 explain why the Data section has been made optional.

14.In Section 8.1 explain why the Header section has been made optional 
for exchange structures that have a root file in the directory.

15.In Section D.1.3 clarify which implementation levels are relevant for 
each string encoding.

16.In Section D.2 ask if the entity instance identifiers are limited to 
a 32 bit address space, 64 bit address space or if it is unlimited.


    Action Items

Lothar Klein to send a copy of the SC4 resolution on file name 
extensions to Martin Hardwick.

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