Entities that contain profiling conditions

Hi All,

in an earlier thread about profiling and entities, I read that you can use
entities like this:

<!ENTITY MYOS "<phrase os="lin">linux content</phrase><phrase os="win">windows
content</phrase>">

This is exactly what I need, but unfortunately it does not work, because of the
quotes after the = character (xsltproc says: entity not terminated).
I've tried to escape the quotes using &quot; but that does not work either
(opening quote expected for profiling condition).

Is there a simple way to get this work?

Thanks.

Robert Fekete