OBJ (programming language)

OBJ is a programming language family introduced by Joseph Goguen in 1976, and further worked on by Jose Meseguer.

Overview

It is a family of declarative "ultra high-level" languages. It features abstract types, generic modules, subsorts (subtypes with multiple inheritance), pattern-matching modulo equations, E-strategies (user control over laziness), module expressions (for combining modules), theories and views (for describing module interfaces) for the massively parallel RRM (rewrite rule machine).<ref name="foldoc">Template:Foldoc</ref>

Members of the OBJ family of languages include CafeOBJ, Eqlog, FOOPS, Kumo, Maude, OBJ2, and OBJ3.<ref>The OBJ family</ref>

OBJ2

OBJ2 is a programming language with Clear-like parametrised modules and a functional system based on equations.

OBJ3

OBJ3 is a version of OBJ based on order-sorted rewriting. OBJ3 is agent-oriented and runs on Kyoto Common Lisp AKCL.

See also

• Automated theorem proving
• Comparison of programming languages
• Formal methods

References

• J. A. Goguen, Higher-Order Functions Considered Unnecessary for Higher-Order Programming. In Research Topics in Functional Programming (June 1990). pp. 309–351.
• "Principles of OBJ2", K. Futatsugi et al., 12th POPL, ACM 1985, pp. 52–66.
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External links

• The OBJ archive
• The OBJ family
• Information and OBJ3 manual, PostScript format