| Sat, 09 Jan 2010 09:38:34 +0100 | Christian Urban | introduced separate match function | file | diff | annotate |
| Sat, 09 Jan 2010 08:52:06 +0100 | Christian Urban | removed obsolete equiv_relation and rnamed new_equiv_relation | file | diff | annotate |
| Fri, 08 Jan 2010 19:46:22 +0100 | Cezary Kaliszyk | New_relations, all works again including concat examples. | file | diff | annotate |