Hi there, I am working on a project with po4a, its configuration file contains many entries and I would like to help building derivatives. One problem is that addenda may be modified, added or removed by derivatives. I do not know yet what others will be doing with addenda, but my feeling is that current handling of addenda is too rigid. Current syntax is: add_<lang>:<path> I propose to allow prepending modifiers to path: add_<lang>:[?!@]*<path> where '?' marks <path> as being optional, '!' discards any further inclusion of <path>, and '@' means that <path> contains a list of addenda, one file per line (those paths may also be prefixed by modifiers). A patch against current CVS is attached (without documentation nor tests for now). Example: In configuration file: ... add_$lang:?@po4a/add_$lang/lists/local-pre.list \ add_$lang:?po4a/add_$lang/addendum \ add_$lang:?@po4a/add_$lang/lists/local-post.list All addenda are optional, first and third addenda contain lists of paths instead of addenda. If po4a/add_fr/lists/local-pre.list contain the 2 lines !po4a/add_fr/addendum po4a/add_fr/my-addendum and local-post.list does not exist, the only addendum for the French translation will be 'po4a/add_fr/my-addendum'. Note that $lang is expanded before addenda are processed, so lists must not contain any variable. What do you think about that? Denis