- From: Jon Ferraiolo <jferrai@us.ibm.com>
- Date: Mon, 11 Dec 2006 14:33:36 -0800
- To: public-appformats@w3.org
- Message-ID: <OFF6502BF7.321B5F13-ON88257241.00779DD8-88257241.007BED1B@us.ibm.com>
I noticed that Widgets 1.0 requires that widgets are bundled in ZIP. To save everyone time and energy, and to get the industry all on the same page, you should take a look at the OCF standard from the IDPF (the ebook/epublishing standards group). The URL is: http://www.idpf.org/ocf/ocf1.0/index.htm This specification addresses all of the complexities with using ZIP as part of a standard. OCF builds upon another industry standard, ODF (http://www.oasis-open.org/committees/tc_home.php?wg_abbrev=office). OCF's approach to ZIP is designed to be upwardly compatible with the ZIP packaging used in ODF, the ISO standard for office documents. One difference from the latest Widgets 1.0 spec is that OCF requires ZIP64 support, whereas Widgets 1.0 excludes it. (Not sure why anyone in the year 2006 would produce a specification that intentionally prevents 64-bit addressing....) In fact, 64-bit support is the only newer feature from ZIP that OCF requires. The primary new inventions in OCF beyond the ZIP packaging used in ODF are: * For bootstrapping, it requires a nearly trivial META-INF/container.xml file to point to the root file(s) within the container. (For HTML, the root file is usually index.html.) * It defines standard locations for package-level metadata (META-INF/metadata.xml), digital signatures (META-INF/signatures.xml), encryption (META-INF/encryption.xml), and rights management (META-INF/rights.xml), and requires XML Signatures and XML Encryption if signatures or encryption are used. The IDPF tried its best to address its own needs for ebooks/epublishing, but do so in a manner that meets industry needs on a general basis and keep things as simple as possible. Jon Jon Ferraiolo <jferrai@us.ibm.com> Web Architect, Emerging Technologies IBM, Menlo Park, CA Mobile: +1-650-926-5865
Received on Monday, 11 December 2006 22:34:00 UTC