unconceal symbols stemming from inductive_set specifications, which are regular part of user-space specification;
also unconceal corresponding primitive definitions, which are official conversions between predicates and sets
syntax: glob
*~
*.class
*.jar
*.marks
*.orig
*.rej
.DS_Store
.swp
syntax: regexp
^contrib
^heaps/
^browser_info/
^doc/.*\.dvi
^doc/.*\.eps
^doc/.*\.pdf
^doc/.*\.ps
^src/Tools/jEdit/dist/