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Posted to dev@lucene.apache.org by "Rupert Westenthaler (JIRA)" <ji...@apache.org> on 2018/02/23 11:26:00 UTC
[jira] [Updated] (LUCENE-8183) HyphenationCompoundWordTokenFilter
creates overlapping tokens with onlyLongestMatch enabled
[ https://issues.apache.org/jira/browse/LUCENE-8183?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Rupert Westenthaler updated LUCENE-8183:
----------------------------------------
Description:
The HyphenationCompoundWordTokenFilter creates overlapping tokens even if onlyLongestMatch is enabled.
Example:
Dictionary: {{gesellschaft}}, {{schaft}}
Hyphenator: {{de_DR.xml}} //from Apche Offo
onlyLongestMatch: true
|text|gesellschaft|gesellschaft|schaft|
|raw_bytes|[67 65 73 65 6c 6c 73 63 68 61 66 74]|[67 65 73 65 6c 6c 73 63 68 61 66 74]|[73 63 68 61 66 74]|
|start|0|0|0|
|end|12|12|12|
|positionLength|1|1|1|
|type|word|word|word|
|position|1|1|1|
IMHO this includes 2 unexpected Tokens
# the 2nd 'gesellschaft' as it duplicates the original token
# the 'schaft' as it is a sub-token 'gesellschaft' that is present in the dictionary
was:
The HyphenationCompoundWordTokenFilter creates overlapping tokens even if onlyLongestMatch is enabled.
Example:
Dictionary: {{gesellschaft}}, {{schaft}}
Hyphenator: {{de_DR.xml}} //from Apche Offo
onlyLongestMatch: true
|HCWTF|
|
|text|
|raw_bytes|
|start|
|end|
|positionLength|
|type|
|position|
|
|
|
|gesellschaft|
|[67 65 73 65 6c 6c 73 63 68 61 66 74]|
|0|
|12|
|1|
|word|
|1|
|
|
|
|gesellschaft|
|[67 65 73 65 6c 6c 73 63 68 61 66 74]|
|0|
|12|
|1|
|word|
|1|
|
|
|
|schaft|
|[73 63 68 61 66 74]|
|0|
|12|
|1|
|word|
|1|
|
|
IMHO this includes 2 unexpected Tokens
# the 2nd 'gesellschaft' as it duplicates the original token
# the 'schaft' as it is a sub-token 'gesellschaft' that is present in the dictionary
> HyphenationCompoundWordTokenFilter creates overlapping tokens with onlyLongestMatch enabled
> -------------------------------------------------------------------------------------------
>
> Key: LUCENE-8183
> URL: https://issues.apache.org/jira/browse/LUCENE-8183
> Project: Lucene - Core
> Issue Type: Bug
> Components: modules/analysis
> Affects Versions: 6.6
> Environment: Configuration of the analyzer:
> <tokenizer class="solr.WhitespaceTokenizerFactory"/>
> <filter class="solr.LowerCaseFilterFactory"/>
> <filter class="solr.HyphenationCompoundWordTokenFilterFactory"
> hyphenator="lang/hyph_de_DR.xml" encoding="iso-8859-1"
> dictionary="lang/wordlist_de.txt"
> onlyLongestMatch="true"/>
>
> Reporter: Rupert Westenthaler
> Priority: Major
>
> The HyphenationCompoundWordTokenFilter creates overlapping tokens even if onlyLongestMatch is enabled.
> Example:
> Dictionary: {{gesellschaft}}, {{schaft}}
> Hyphenator: {{de_DR.xml}} //from Apche Offo
> onlyLongestMatch: true
>
> |text|gesellschaft|gesellschaft|schaft|
> |raw_bytes|[67 65 73 65 6c 6c 73 63 68 61 66 74]|[67 65 73 65 6c 6c 73 63 68 61 66 74]|[73 63 68 61 66 74]|
> |start|0|0|0|
> |end|12|12|12|
> |positionLength|1|1|1|
> |type|word|word|word|
> |position|1|1|1|
> IMHO this includes 2 unexpected Tokens
> # the 2nd 'gesellschaft' as it duplicates the original token
> # the 'schaft' as it is a sub-token 'gesellschaft' that is present in the dictionary
>
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