- From: Chris Lilley <chris@w3.org>
- Date: Wed, 27 Apr 2011 21:56:48 +0200
- To: Bert Bos <bert@w3.org>
- CC: www-font@w3.org
Hello Bert You wrote > 8) Section 4: It is a pity that there are multiple ways to encode the > same font, and even to encode the same OpenType file: each table > may be compressed or not, extended metadata may be added or not, > private data may be added or not. That means you cannot do a simple > binary compare to see if two files encode the same OpenType file, let > alone the same font. A unique (canonical) format would also have > helped with digital signing: Now it is possible to decode and re- > encode the font without doing anything else and still end up with a > broken digital signature. Yes, metadata is optional and yes, a table may be compressed or not. Since the metadata is part of the WOFF file, the same opentype data may well be present with two different sets of metadata 9for example the same font may be licensed to two different licensees, with different conditions or different license IDs. As to digital signatures, the OpenType spec has a table DSIG and this will round trip through WOFF without change. Thus, we don't plan to make any changes based on this comment. Please respond to indicate whether you accept this resolution. -- Chris Lilley Technical Director, Interaction Domain W3C Graphics Activity Lead, Fonts Activity Lead Co-Chair, W3C Hypertext CG Member, CSS, WebFonts, SVG Working Groups
Received on Wednesday, 27 April 2011 19:57:44 UTC