It must be remembered that Rexsel is not a wholly independant from XSLT. It is a means of writing XSLT in a more compact and simple form. As such users of Rexsel should be familiar with XML and XSLT.
Most of the Rexsel syntax uses familiar keywords that have a direct analogue within XSLT. However, there are certain restrictions and enhancements which, while not onerous, must be borne in mind when writing Rexsel stylesheets.