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Cue is a data notation created in 2018 by Marcel van Lohuizen.

#293on PLDB 6Years Old
Download source code:
git clone

Try now: Web

CUE has moved to

Example from the web:
#Spec: { kind: string name: { first: !="" // must be specified and non-empty middle?: !="" // optional, but must be non-empty when specified last: !="" } // The minimum must be strictly smaller than the maximum and vice versa. minimum?: int & <maximum maximum?: int & >minimum } // A spec is of type #Spec spec: #Spec spec: { knid: "Homo Sapiens" // error, misspelled field name: first: "Jane"

Language features

Feature Supported Token Example
// A comment
Line Comments //
// A comment
Semantic Indentation X

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