2012-09-20 ago tuned;
2012-09-18 ago recover order of stacked markup;
2012-09-18 ago some actual rich text markup via XML.content_markup;
2012-03-08 ago simplified -- plain map_index is sufficient (pointed out by Enrico Tassi);
2011-11-29 ago separate compilation of PIDE vs. Pure sources, which enables independent Scala library;
2011-11-28 ago explicit indication of modules for independent Scala library;
2011-09-07 ago XML.cache for partial sharing (strings only);
2011-09-05 ago tuned imports;
2011-09-04 ago simplified signatures;
2011-09-04 ago synchronous XML.Cache without actor -- potentially more efficient on machines with few cores;
2011-09-04 ago moved XML/YXML to src/Pure/PIDE;