Symphony.

I was wondering if there's a way to filter datasources by XSLT params. So far you can create a page and define some URL "chains" like year/month/day, but these chains cannot be broken in order to work properly.

What I would like to do on my weblog is to implement an Archive page where each page param is independent one another. For example, I may want to leave "year" and "day" empty (i.e. archive/_/10/) to let the system select only those entries which have been posted within that month.

I thought it might be done through XSLT by checking if the $year parameter was "_" and if necessary by overwriting its value with $last-year, but it didn't work. Thus I've come up with the following question: is there any way to define global parameters through XSLT that can be used to filter datasources, in the same way as page params act?

Simone