Thw W3C XHTML working group has posted the first working draft of Modularization of XHTML, 2nd edition. Besides the incorporation of errata, the big change in this edition is the addition of W3C XML Schema Language modules for XHTML.
Tim Bray has posted a beta of Genx, his pure C library for
outputting canonical XML. The beta fixes bugs and
adds a genxGetVersion function. Genx is now published under the expat license. This is a very liberal, non-viral but GPL-compatiblelicense.