I expect that the coming year will bring continued growth and innovation in the sphere of HTML5-based software tools for publishers. In June of 2013, the W3C launched the Digital Publishing Interest Group with the goal of bringing together publishing veterans to work on bridging the gap between the needs of book/journal/magazine publishers and the technological capabilities afforded by W3C specifications.
At O’Reilly Media, as we work on transitioning to an XHTML5-source* workflow (which will be the cornerstone of the next release of our Atlas publishing platform),** we have posted an open source project on GitHub calledHTMLBook. The HTMLBook project contains an XML Schema that subsets the HTML5 content model to provide specifications for book-specific semantics, such as chapters, appendixes, and sidebars. Additionally, it contains a sample CSS stylesheet for styling HTML5 content for PDF output using CSS3 Paged Media, andXSL tools for autogenerating book navigation elements including tables of contents, indexes, and cross-references, as well as generating the necessary metadata and package files for EPUB 3 output. We look forward to continued collaboration around the development of HTML5 authoring tools for publishers.