Glue is a procedural language for deductive databases. It is designed to complement the purely declarative NAIL! language, firstly by performing system functions impossible to write in NAIL!, and secondly by allowing the procedural specification of algorithms for critical code sections. The two

... database system. Nail is a purely declarative query language; Glue is a procedural language used for non-query activities. The two languages combined are sufficient to write a complete application. Nail and Glue code are both compiled into the target language IGlue. The Nail compiler uses

We describe the design and implementation of Relationlog, a persistent deductive database system. Unlike other related systems such as Aditi, CORAL, LDL, LOLA and Nail-Glue, Relationlog supports effective storage, efficient access and inference of large amounts of data with complex structures

of the concept of stratified negation and stratified set aggregates [16]. This concept is significant since it removes several of the limitations and problems of Prolog's negationby -failure, and it is conducive to efficient implementation, as demonstrated by systems such as Glue-Nail, LDL and CORAL [15, 22

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I declare that this thesis is my own account of my research and contains as its main content work which has not previously been submitted for a degree at any tertiary education institution.