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From "James Kosin (Commented) (JIRA)" <>
Subject [jira] [Commented] (OPENNLP-471) DictionaryNameFinder has HASHing issues
Date Thu, 15 Mar 2012 03:57:49 GMT


James Kosin commented on OPENNLP-471:

Another possibility is to set an integer value that contains the longest size (in tokens)
for the longest entry in the dictionary.

find() could use this to a) allow it to expand the search in the dictionary for more tokens
and b) if only 1 token in all entries allows us to stop trying to find more tokens.

It may be the best compromize under the circumstances.
I'll let the group decide....

> DictionaryNameFinder has HASHing issues
> ---------------------------------------
>                 Key: OPENNLP-471
>                 URL:
>             Project: OpenNLP
>          Issue Type: Bug
>          Components: Name Finder
>            Reporter: James Kosin
>              Labels: dictionary, namefinder
> The DictionaryNameFinder has issues finding multi-token names when the dictionary is
searched a token at a time by the find() method.  If, the dictionary doesn't have a single
(or shorter) token match available in the dictionary.
> Having a dictionary with {"folic", "acid"} without an entry for {"folic"} will cause
the find() method to totally skip the fact there is a longer match possible.
> Thanks to Jim for pushing this and to my debugging skills to find.
> Two possiblilites come to mind:
> 1)  I don't really like, is we turn it into a larger problem by trying longer matches
when shorter ones don't match.  Unfortunately, this turns quickly into a race to see who can
wait longer.
> 2)  A way of returning a possible match that may need exploring, or a look-ahead type
system to say we don't match "folic" but if you have "acid" after "folic" we have a match
for that in the dictionary.
> 3)  Leave it as is and modify the dictionary to add shorter terms to the dictionary...
maybe marking as not-a-valid entry so we can know we need a longer match.

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