Specification languages come typically non directly executed. It describe the formulas at the good deal higher level than a programing language. Indeed, these are considered as an error in case the requirement specification is cluttered by having unecessary implementation detail, because a specification is intended to describe a what, non a how else.

Specifications must exist as subject to the run of filtration (a filling-around of implementation detail) prior to it may actually exist as implemented the symptom of such a filtration run is an practicable algorithmic rule, which is either formulated around a programing language, or even within an practicable subset of the specification language at hand. E.g., Hartmann pipelines, when properly applied, can be considered the dataflow specification which is directly executable. Another example is the Actor model which has no specific application content & must exist as specialized to become viable.

An significant have of specification languages is enabling a creation of proofs of program correctness (see theorem prover).

Specification languages
Actor model Alloy language Assertion definition language B specification language Common Algebraic Specification Language (CASL) Extended ML Java Modeling Language (JML) Object-Z SDL Unified Modeling Language VDM specification language Z specification language Hartmann pipeline

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