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A formal specification of the jq language

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arxiv 2403.20132 v1 pith:HWMCTMHN submitted 2024-03-29 cs.LO cs.PL

A formal specification of the jq language

classification cs.LO cs.PL
keywords languageformalallowsbehaviourcontributioncurrentlydatadenotational
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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jq is a widely used tool that provides a programming language to manipulate JSON data. However, the jq language is currently only specified by its implementation, making it difficult to reason about its behaviour. To this end, we provide a formal syntax and denotational semantics for a large subset of the jq language. Our most significant contribution is to provide a new way to interpret updates that allows for more predictable and performant execution.

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