Comment 18 for bug 75654

I think a simple solution would be to add a boolean attribute called ExcludeFromLibrary to each track in the xml file. If the parser comes across such an attribute with a true value, then it simply ignores it.

When adding new files to the library, it would be a good idea to run through the list of excluded files to ensure that it has not already been excluded. If it is found in that list, then the attribute is flipped to false. This will stop the library file getting clogged up with duplicate excluded tracks.