Well-formed or wellformed indicate syntactic correctness and may refer to:
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Well-formedness, quality of linguistic elements that conform to grammar rules
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Well-formed formula
In mathematical logic, propositional logic and predicate logic, a well-formed formula, abbreviated WFF or wff, often simply formula, is a finite sequence of symbols from a given alphabet that is part of a formal language. A formal language can be ...
, a string that is generated by a formal grammar in logic
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Well-formed element, web design element that is properly designed and ordered
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Well-formed document, XML document that adheres to the syntax rules of the XML 1.0 specification
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Well-formed Petri net, a Petri net class
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Well-formed scale
In diatonic set theory, a generated collection is a collection or scale formed by repeatedly adding a constant interval in integer notation, the generator, also known as an interval cycle, around the chromatic circle until a complete collection ...
, a class of musical scales
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