Dear friends,
I have just finished a paper
CASL: From Semantics to Tools
containing a general non-technical desciprtion
of the Bremen HOL-CASL system, and some general
ideas about tools for CASL. The paper is
available under
http://www.informatik.uni-bremen.de/~till/publications.html
Greetings,
Till
P.S.
A new version of the HOL-CASL system will be released soon.