Use of Logic Programming for Complex Business Rules

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Abstract

This paper describes the move from a proprietary mainframe application to open systems application running the 360 º Fares System whose business logic component is implemented in Prolog. It is one of the largest and most profitable Prolog applications written. Prolog is the business-rule component in a multi-component application that includes network, user interface, security data access tiers. There has been no downtime, scheduled or unscheduled, in the 360 º Fares System since June 2004.