The currently defined fields are as follows:-
Field abbr o|c Description Header fields VERSION=%s V o Lattice specification adhered to UTTERANCE=%s U o Utterance identifier SUBLAT=%s S o Sub-lattice name base=%f o LogBase for Likelihoods (0.0 not logs,default base e) lmname=%s o Name of Language model lmscale=%f o Scaling factor for language model wdpenalty=%f o Word insertion penalty Lattice Size fields NODES=%d N c Number of nodes in lattice LINKS=%d L c Number of links in lattice Node Fields I=%d Node identifier. Starts node information time=%f t o Time from start of utterance (in seconds) WORD=%s W wc Word (If lattice labels nodes rather that links) L=%s wc Substitute named sub-lattice for this node var=%d v wo Pronunciation variant number Link Fields J=%d Link identifier. Starts link information START=%d S c Start node number (of the link) END=%d E c End node number (of the link) WORD=%s W wc Word (If lattice labels links rather that nodes) var=%d v wo Pronunciation variant number div=%s d wo Segmentation [ d=:(label[,duration,like]:)+ ] acoustic=%f a wo Acoustic likelihood of link ngram=%f n o NGram likelihood of link language=%f l o General language model likelihood of link Note. The word identity (and associated `w' fields var,div and acoustic) must appear on either the link or the end node (forwards lattices) or the start node (backwards lattices) of the link. abbr is a possible single character abbreviation for the field name o|c indicates whether field is optional or compulsory.