From carson@siggraph.org Wed Apr 30 03:08:05 1997 Received: from siggraph.cgrg.ohio-state.edu (siggraph.cgrg.ohio-state.edu [128.146.18.100]) by dkuug.dk (8.6.12/8.6.12) with ESMTP id DAA25653 for ; Wed, 30 Apr 1997 03:08:03 +0200 Received: from study.huntleigh.com (carson@siggraph.org) by siggraph.cgrg.ohio-state.edu (8.8.5/941010.52) with SMTP id VAA14142; Tue, 29 Apr 1997 21:07:31 -0400 (EDT) Message-Id: <3.0.32.19970424110430.00ca48e0@siggraph.cgrg.ohio-state.edu> X-Sender: carson@siggraph.cgrg.ohio-state.edu X-Mailer: Windows Eudora Pro Version 3.0 (32) Date: Tue, 29 Apr 1997 19:09:27 -0600 To: SC24@dkuug.dk, chris@w3.org From: Steve Carson Subject: PNG Agenda Cc: mcbroome@csn.org, jcg@intercap.com, hattori@sysrap.cs.fujitsu.co.jp, moeller@fokus.gmd.de, egloff@deteberkom.de, a.m.mumford@lut.ac.uk, lofton@cgm.com, a.h.francis@open.ac.uk, hjkimn@garam.kreonet.re.kr, lsr@nist.gov, inagaki@mbd.ntt.jp, andre.ducrot@inria.fr, puk@igraphics.com, aono@trl.ibm.co.jp.timamura@docs.sc.fuchu.toshiba.co.jp, rikk@best.com, zara@cs.felk.cvut.cz, carson@siggraph.org, cmarrin@sgi.com, silbermann@zko.dec.com Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable PNG Agenda for Metafiles RG in Kista ------------------------------------ This is a follow-up to the earlier preliminary announcement to the SC24 reflector. It is being distributed both to Metafiles RG participants and to the full reflector, so some of you may get two copies. This mail has several parts: 1) Purpose of the meeting 2) Final agenda for the PNG discussions at Kista 3) W3C Contact 4) Location of the Baseline PNG Document 5) Background Info on Intellectual Property Issues Purpose of the meeting ---------------------- To determine whether SC24 will initiate a New Work Item Proposal to process the W3C Portable Network Graphics (PNG) Specification as an ISO/IEC= Standard. Final agenda for the PNG discussions at Kista --------------------------------------------- Friday 23 May : (following afternoon break) One hour (approximate) Tutorial on PNG by Chris Lilly of W3C. Question and answer session for the remainder of the day. Saturday 24 May: All morning is set aside for PNG discussions, from whatever the agreed start time for that day is up to the lunch break. The agenda items are: 1. Discussion of whether or not to initiate work in SC24 based on PNG 2. Intellectual Property Issues 3. Review of draft Letter of Intent to proceed with the work 4. Review of draft Cooperative agreement (including discussion of the exact terms and conditions that W3C and SC24 mutually agree to; this will include schedule constraints and permissible modifications to the base document.) 5. Proposing W3C as a Class C Liaison to SC24 for this project 5. Drafting (or outlining) of recommendations to WG6 W3C Contact ----------- Those of you who are also involved in W3C may want to know our contact there. It is Chris Lilley. He will be at the Kista meeting to work with us. Here is his contact information: Chris Lilley, W3C [ http://www.w3.org/ ] Graphics and Fonts Guy The World Wide Web Consortium http://www.w3.org/people/chris/ INRIA, Projet W3C chris@w3.org 2004 Rt des Lucioles / BP 93 +33 (0)4 93 65 79 87 06902 Sophia Antipolis Cedex, France Location of the Baseline PNG Document ------------------------------------- Chris Lilly furnished this information for us: The canonical reference is http://www.w3.org/pub/WWW/TR/REC-png ^^ Technical Reports for ease of browsing - rather than reference - a multi-file version (derived automatically from a master copy which also produced the single-file version) is available: http://www.w3.org/pub/WWW/TR/REC-png-multi The document is available (using content negotiation) in html, html.gz, text, text.gz, PostScript, PostScript.gz and PDF. Additional information is available at http://www.w3.org/pub/WWW/Graphics/PNG [1] The PNG Recommendation contains this list of changes since the Tenth Draft of 5 May, 1995: Clarified meaning of a suggested-palette PLTE chunk in a truecolor image that uses transparency Clarified exact semantics of sBIT and allowed sample depth scaling procedures Clarified status of spaces in tEXt chunk keywords Distinguished private and public extension values in type and method fields Added a "Creation Time" tEXt keyword Macintosh representation of PNG specified Added discussion of security issues Added more extensive discussion of gamma and chromaticity handling, including tutorial appendixes Clarified terminology, notably sample depth vs. bit depth Added a glossary Editing and reformatting The clarification, editing and reformatting was fairly extensive and was greatly helped by W3C member review wihlst the specification was at Proposed Recommendation stage. In particular I would like to acknowledge the detailed comments from Bob Hopgood at that time, which were a great aid to clarity= and consistency. Background Info on Intellectual Property Issues ----------------------------------------------- The PNG specification contains this notice regarding Intellectual Property Rights (IPR): - - - W3C COPYRIGHT NOTICE COPYRIGHT NOTICE Copyright =A9 1996 by: Massachusetts Institute of Technology (MIT)=20 This W3C specification is being provided by the copyright holders under the following license. By obtaining, using and/or copying this specification, you agree that you have read, understood, and will comply with the following terms and conditions:=20 Permission to use, copy, and distribute this specification for any purpose and without fee or royalty is hereby granted, provided that the full text of this NOTICE appears on ALL copies of the specification or portions thereof, including modifications, that you make.=20 THIS SPECIFICATION IS PROVIDED "AS IS," AND COPYRIGHT HOLDERS MAKE NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED. BY WAY OF EXAMPLE, BUT NOT LIMITATION, COPYRIGHT HOLDERS MAKE NO REPRESENTATIONS OR WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF THE SPECIFICATION WILL NOT INFRINGE ANY THIRD PARTY PATENTS, COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS. COPYRIGHT HOLDERS WILL BEAR NO LIABILITY FOR ANY USE OF THIS SPECIFICATION.=20 The name and trademarks of copyright holders may NOT be used in advertising or publicity pertaining to the specification without specific, written prior permission. Title to copyright in this specification and any associated documentation will at all times remain with copyright holders.=20 - - - This copyright notice was sent to ISO/CS for review and they have given us this advice: From: chabot@iso.ch (Chabot, Jacques-Olivier) To: "Carson, Steve" Subject: A copyright issue Date: Mon, 14 Apr 97 16:32:00 GMT Encoding: 28 TEXT Dear Mr. Carson, Keith Brannon has transferred to me your question regarding copyright issues= =20 in respect of JTC1/SC24 using the PNG specifications for the preparation of= =20 an ISO/IEC standard. As you know, ISO claims the copyright on all its standards. In addition our= =20 rule is that our members must have the possibility to implement any ISO=20 standard as a national standard, in which case they will similarly claim=20 copyright on the national adoption. It would therefore be easier if you=20 could obtain from MIT and/or W3C a full copyright release. If this is not possible, then we should further discuss with a view to have= =20 MIT and/or W3C agree to transfer to ISO/IEC, all the publication and=20 distribution rights for the International Standard that you are preparing,= =20 as well as extending these rights to ISO/IEC members wishing to adopt this= =20 International Standard as a national standard. This would also imply the rights of both organizations and their members to= =20 publish electronic versions, as well as secondary publications of this=20 International Standard. I hope this answers correctly your questions and please feel free to contact= =20 me should you need any additional information. Yours sincerely, Jacques-Olivier Chabot Director General Services and Marketing --------------------------------------------------------- Steve Carson phone: +1-505-521-7399 GSC Associates Inc. fax: +1-505-521-9321 5272 Redman Road e-mail: carson@siggraph.org Las Cruces, NM 88011 USA ---------------------------------------------------------