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A prologue or prolog (from Greek πρόλογος prólogos, from πρό pró, "before" and λόγος lógos, "word") is an opening to a story that establishes the context and gives background details, often some earlier story that ties into the main one, and other miscellaneous information.
Prolog is a logic programming language that has its origins in artificial intelligence, automated theorem proving and computational linguistics. [1] [2] [3]Prolog has its roots in first-order logic, a formal logic, and unlike many other programming languages, Prolog is intended primarily as a declarative programming language: the program is a set of facts and rules, which define relations.
"What is past is prologue", inscribed on Present (1935, Robert Aitken) located on the northeast corner of the National Archives Building in Washington, DC "What's past is prologue" is a quotation of William Shakespeare from his play The Tempest. In contemporary use, the phrase stands for the idea that history sets the context for the present.
Operationally, Prolog's execution strategy can be thought of as a generalization of function calls in other languages, one difference being that multiple clause heads can match a given call. In that case, the system creates a choice-point, unifies the goal with the clause head of the first alternative, and continues with the goals of that first ...
A prologue is a prefatory piece of writing. Prologue may also refer to: A prologue time trial, a short opening stage often used in road cycling races; Movie prologue, a stage show performed in movie theaters, mainly in the silent film era
In assembly language programming, the function prologue is a few lines of code at the beginning of a function, which prepare the stack and registers for use within the function. Similarly, the function epilogue appears at the end of the function, and restores the stack and registers to the state they were in before the function was called.
A movie prologue or prolog was a short live vaudeville show, performed at the start of film showings in movie theaters in the United States, especially at the end of the silent film era in the 1920s and early 1930s. The idea was first introduced by Sid Grauman in 1918 at his theaters in Hollywood. Many imitations followed. [1]
The opposite is a prologue—a piece of writing at the beginning of a work of literature or drama, usually used to open the story and capture interest. [2] Some genres, for example television programs and video games, call the epilogue an "outro" patterned on the use of "intro" for "introduction".