Release contains XTM 2.1 read/write support (QuaaxTMIO library) as well as a bug fix for the CXTM writer (also QuaaxTMIO library).
See https://sourceforge.net/projects/quaaxtm/develop for checkout URL.
QuaaxTM 0.52 has been released containing the initial version of QuaaxTMIO - the Topic Maps syntaxes readers/writers library which works against PHPTMAPI. Initial version ships with an XTM 2.0 reader and writer. The IO tests are based on CXTM. This proves the standards conformity of QuaaxTM.
The new QuaaxTM which implements PHPTMAPI 2.0 is now available from the SVN: https://sourceforge.net/scm/?type=svn&group_id=178047