Regular expression documentation

[Andrew Parsloe]

As the ability to search for regular expressions is one of the `big' new 
features of LyX 2.0, I think there should be a more expansive treatment 
of them than the brief section in the User's Guide.

TeXworks is installed with MikTeX these days and has what looks to be an 
excellent section in its manual (Appendix B) on regular expressions -- 
tables of them with introductory and explanatory comment. It looks more 
helpful to me than the Wikipedia article referenced in the User's Guide. 
The appendix begins, `As TEXworks is built on Qt4, the available regular 
expressions—which are often referred to as regexp—are a subset of those 
found in Qt4' so presumably these will be the same as are used in LyX. 
Since TeXworks is distributed under the Gnu GPL version 2, perhaps it 
would be possible to `borrow/share' the appendix and insert it into the 
Additonal Features (?) manual (with due acknowledgement)?

Andrew