Feature request: Schema handlers for ext/xsl

Hello, as ext/sablot has been removed from CVS [1], I would like to make a feature request. One of the features I really liked about Sablotron was the possibility of using schema handlers [2] to be able to realize callbacks to PHP while processing (I used it to calculate image sizes if needed, to retrieve "include"-snippets from a database and to track dependencies). AFAIS, there is no such feature in th current ext/xsl (correct me if I'm wrong), but after looking at some of libxml2's documentation, I guess it would be possible [3]. Is someone already thinking of implementing this? 1] http://cvs.php.net/cvs.php/php-src/ext/sablot?sa=1&login=2 2] http://de3.php.net/manual/en/function.xslt-set-scheme-handlers.php 3] http://mail.gnome.org/archives/xml/2001-March/msg00022.html - Timm