schema:          POEM-SCHEMA
type-name:       poem
key:             poem mandatory single primary lookup
key:             descr optional multiple
key:             form mandatory single inverse poetic-form
key:             text mandatory multiple
key:             author optional multiple inverse person
key:             remarks optional multiple
key:             notify optional multiple inverse person
key:             mnt-by mandatory single inverse mntner
key:             changed mandatory multiple
key:             source mandatory single
