Lojban has an unambiguous grammar based on the principles of logic. This grammar is a fundamental part of what makes Lojban the language it is. As a consequence, it has received careful study and criticism.

An unambiguous grammar is formal and regular. There is a single, unambiguous structure (called a parse tree) resulting from any text. Lojban grammar does not specify semantics. The meaning of any particular parse tree is outside the scope of the grammar.


Official Grammar


.alyn.post. is working on a proposal for a 4th baseline for the Lojban machine grammar, replacing the YACC specification with PEG.

Main Article: PEG

Implementations of a Lojban grammar

Detailed Discussion

The following pages contain technical details and discussion concerning Lojban's grammar:

Further Reading

See Also

Uncategorized Material

The following material relates to Lojban's grammar but has not yet been reviewed for curation: