On 12 juin 08, at 08:01, Vincent Massol wrote: Hi all, Yes. By definition a partition is not overlapping, so if styles can be composed generating a "compound style" such as bold-italic, this should be in the context of a new partition type. For the parser Vincent has mentioned... It would be good to use it as the "foundation". The idea is to use this parser as the "partitioner" where partitions are the terminal symbols of the underlying grammar. However, I guess we should check the compatibility of the Eclipse-way of doing such a kind of things (that seems to me more regex-oriented) vs the classical way using a lexer-parser. You might explore a little bit this solution, looking at Vincent's parser. I avail myself of this mail for saying that there is an intern at XWiki, Venkatesh Nandakumar, that is working on a XWiki semantic editor, that apparently has some overlap with your work. Venkatesh has already written some Eclipse-oriented syntax-highlighting code. Since I am not aware of what has been done, Venkatesh should present what he did to the list, so that we can minimize the efforts and avoid duplicate work. For what concerns your work, I suggest the following steps: 1) Try to finish a first version of the plugin with "compound style" partitioning. This is good for gaining a better understanding of the Eclipse text framework. 2) Take a look at Vincent's parser and try to understand if it's easy/ feasible to use it as the partion-source (I'll look at this issue as well). 3) Wait for Venkatesh to tell us what he has done so that we can all synchronize. Cheers, Fabio