multiple alignment file format?



 Hi:
 	I apologize in advance for this slightly off-topic message...
 	I am looking for definitions for the file formats used to store
 multiple sequence alignments. As you might imagine from the request, I'm
 writing some code to input this data.
 	Can someone point me to a reference or a more relevant mailing
 list?
 	Thanks!
 						Dan Strahs