Zn the past decade, a number of natural language database access systems have been constructed (. Hendrix 1976; Waltz et e l . 1976; Sacerdoti 1978; Harris 1979; Lehner~ and Shwartz 1982; Shvartz 1982). The level of performance achieved by natural language database access systems varies considerably, with the sore robust systems o p e r a t i n g v i t h t n a narrow domain ( i . e . , content area) and r e l y i n g heavily on domain-specif i c knowledge to guide the language understanding process. Transporting.
