A recursive transition network ("RTN") is a graph theoretical schematic used to represent the rules of a context-free grammar.
RTNs have application to programming languages, natural language and lexical analysis.
Any sentence that is constructed according to the rules of an RTN[1] is said to be "well-formed".
The structural elements of a well-formed sentence may also be well-formed sentences by themselves, or they may be simpler structures.
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