Abstract
Attention is paid to structure preserving properties of transformations from a non-left-recursive context-free grammar to a Greibach normal form grammar. It is demonstrated that such a transformation cannot only be ambiguity preserving, but also both cover and functor relations between grammars or their associated syntax-categories can be obtained from such a transformation.
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References
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Nijholt, A. Grammar functors and covers: From non-left-recursive to greibach normal form grammars. BIT 19, 73–78 (1979). https://doi.org/10.1007/BF01931223
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DOI: https://doi.org/10.1007/BF01931223