NGRAM_INFO Struct Reference

Main N-gram structure. More...

#include <ngram2.h>

Collaboration diagram for NGRAM_INFO:

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Data Fields
int	n
	N-gram order (ex. 3 for 3-gram).
int	dir
	direction (either DIR_LR or DIR_RL)
boolean	from_bin
	TRUE if source was bingram, otherwise ARPA.
boolean	bigram_index_reversed
	TRUE if read from old (<=3.5.3) bingram, in which case the 2-gram tuple index is reversed (DIR_LR) against the RL 3-gram.
WORD_ID	max_word_num
	N-gram vocabulary size.
char **	wname
	List of word strings.
PATNODE *	root
	Root of index tree to search n-gram word ID from its name.
WORD_ID	unk_id
	Word ID of unknown word.
int	unk_num
	Number of dictionary words that are not in this N-gram vocabulary.
LOGPROB	unk_num_log
	Log10 value of unk_num, used for calculating probability of unknown words.
boolean	isopen
	TRUE if dictionary has unknown words, which does not appear in this N-gram.
NGRAM_TUPLE_INFO	d [MAX_N]
	Main body of N-gram info.
LOGPROB *	bo_wt_1
	back-off weights for 2-gram on 1st pass
LOGPROB *	p_2
	2-gram prob for the 1st pass
LOGPROB(*	bigram_prob )(struct __ngram_info__ *, WORD_ID, WORD_ID)
	Pointer of a function to compite bigram probability on the 1st pass. See bi_prob_func_set() for details.

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Detailed Description

Main N-gram structure.

bigrams and trigrams are stored in the form of sequential lists. They are grouped by the same context, and referred from the context ((N-1)-gram) data by the beginning ID and its number.

Definition at line 157 of file ngram2.h.

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The documentation for this struct was generated from the following file:

• libsent/include/sent/ngram2.h

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