Datalog is a declarative logic programming language that extends Prolog by allowing function-free Horn clauses, which are rules consisting of a head and a body. It is used in database systems for expressing queries and constraints.

• Database management systems
• Data analysis
• Information retrieval
• Knowledge representation
• Software engineering
• Artificial Intelligence
• Web Data Management

Here is an example of a Datalog program that defines a query to find all books written by an author:

?- writ(john, Book1).
?- writ(mary, Book2).
?- findall(wrote(X), Book(X)).

• ChatGPT has created a tool that can detect when written works are generated by artificial intelligence.