Island parsing is a powerful technique for parsing with Augmented ~ a n s i t i o n Networks (ATNs) which was developed and successfully applied in the HWIM speech understanding project. The HWIM application grammar did not, however, exploit Woods' original full ATN specification. This paper describes an island parsing interpreter based on HWIM, but containing substantial and important extensions to enable it to interpret any grammar which conforms to that full specification of 1970.
