Letter to the W3C Web Applications WG from ISO JTC1/SC 34/WG4

Innovimax SARL innovimax at gmail.com
Tue Dec 29 08:09:36 CET 2009

Dear the W3C Web Applications WG,

I am writing on behalf of ISO/IEC JTC1/SC34/WG4, which is responsible
for the maintenance of ISO/IEC 29500 (OOXML).

WG4 reviewed the working draft "Widgets 1.0: Packaging and
Configuration" with interest.  It provides a package format similar to
the OPC(Open Packaging Conventions), which is specified in ISO/IEC
29500-2.  The text of the OPC specification is available as
ECMA 376 Part 2 (Second Edition)
and from the public ISO Website

WG4 believes that widget packages and OPC packages are meant to meet
different requirements, and thus they cannot be unified in a hurry
without causing significant damage to OOXML, widgets, or both.
Requirements specific to OPC include file renaming and
fallback-guaranteed extensibility through ISO/IEC 29500-3 (Markup
Compatibility and Extensions).  Meanwhile, those specific to widget
packages include start files, icon files, localization, and
preferences among others.

Nevertheless, WG4 believes that there are quite a few similarities
between widget packages and OPC packages, and that information
exchange between the W3C Web Applications WG and WG4 would be very
fruitful.  Specifically, WG4 is interested in URI schemes, media
types, and UTF-8 part names.

WG4 understands that the widget package uses the latest version
(6.3.2) of the ZIP specification, which allows UTF-8.  Meanwhile,
ISO/IEC 29500-2 uses an earlier version (6.2.0) and relies on
the %HH convention, since 6.2.0 was the latest version when
Ecma TC45 started the first edition of OOXML.

JTC1/SC34/WG4 looks forward to your views on this matter.


Mohamed ZERGAOUI on behalf of SC34/WG4 Convenor MURATA Makoto (FAMILY Given)

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