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I got the following email from Frank Lee of web-books.com.  I’m reprinting it because I thought the technical content was interesting:

The browser-based ebook viewer, such as Amazon’s Cloud Reader, has many
great advantages. Last September, we launched the first HTML5-based ebook
viewer for our proprietary format. Recently, our viewer has been able to
read the EPUB books directly from user’s computer. You can add dynamic
background and other features to the EPUB books.

Currently, our viewer works only on the latest versions of FireFox and
Chrome because it uses the database, IndexedDB, to store book contents.
IndexedDB is a new HTML5 standard that is not available on most browsers
yet. We are developing a “mobile” version which will use SQLite to store
book contents. SQLite is not an HTML5 standard, but available on most
mobile devices.

1 COMMENT

  1. Although the HTML 5 standard is still in development, it does include what the W3C calls “web storage” (see: http://www.w3.org/TR/webstorage/) which is implemented in modern browsers (Safari, Chrome and other webkit browsers as well as Firefox which uses the Gekko rendering engine) as an SQL light DB. Ibis Reader (http://ibisreader.com/) also offers these same features both on the web and on mobile devices. It works only with non-DRM’d EPUB however. No proprietary formats are supported.

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