Unclean animals 

I believe that there is a problem with the information regarding exclusions.  The way it reads would imply that the "pig" is an exclusion to the rules set fourth by Jewish law.  Absolutly not true!  You might even say this is in some way a direct contradiction.  Perhaps the original writer used the word (exclusion) erroneously.  If you are unsure of what a word means, you obviously should not use it; especially in an encyclopedia.