Schemas

The ``schema'' of a database is its logical structure:

• the ``tables'' in the database
• the ``type'' of each table
• the ``integrity constraints'' on each table

Example schema:

genpepts: {(
   #accn:  string,
   #uid:   num,
   #title: string,
   #seq:   string,
   #fid:   num)}

features: {(
   #fid:   num,
   #start: num,
   #end:   num,
   #name:  string
   #anno:  string)}