Michelle:
Informix provides the dbschema command. In a very simple form:
dbschema -t all -d testdb all.sql
sends all schema info for testdb database to the file all.sql. You can also do individual tables.
dbschema -t individual_table -d testdb ind_table.sql.
There are other options, so execute 'dbschema' for other options such as displaying views, stored procedures, etc.
You might also check out dbexport/dbimport if you want the schema plus all the data in your database.
Regards,
Ed
Schaefer