Semantics

Syntax, Semantics and Intended Meaning The 1-slide course ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

LP Syntactic Structures ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Term The single data structure ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Substitution A formal definition ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Instances A relationship between terms ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Queries ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Rule of Generalization ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

A Fact ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Rule of Instantiation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

A Rule ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],My best attempt at communicate meaning is by offering yet another syntactic structure form some other symbol system with yet another semantics that I hope my audience understands. Where is meaning ultimately captured? Is it captured at all? We gather evidence that expressions in one system align with expressions in another. At some point we agree that we understand each other. But do we? Have we capture meaning or just aligned expressions in different symbol systems to realize functional communication? Does the meaning of the American word love have a direct analog in Latin?

Rule of Universal Modus Ponens ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

A Logic Program ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Facts are rules where the body is empty. Rules with bodies

More on Semantics Declarative and Operational

Declarative Semantics What it means is what it is . ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Operational Semantics What it means is what a procedure produces. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Classic Programming Languages ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Goal Reduction The computational core of LP

Elements of Goal Reduction ,[object Object],[object Object],[object Object]

Unification ,[object Object],[object Object],[object Object],[object Object],[object Object]

Most General Unifier(MGU) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],None, None {X=A, Y=1}, None {X=A, Y=B}, None {X=1,Y=2}, {Y=2} {X=1,Y=B}, {Y=B}

Unification Procedure ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Unification Examples ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Resolution ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Resolution Example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Chronological Backtracking ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Backtracking Example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Search order matters. Put compatible first in the plugsIn rule?

Practical Introduction to Prolog Basics

Programming Excursions ,[object Object],[object Object],[object Object],[object Object],[object Object]

Practical Introduction to Prolog Negation and the Cut

Semantics

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Semantics