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https://issues.apache.org/jira/browse/SOLR-572?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12608487#action_12608487
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Geoffrey Young commented on SOLR-572:
-------------------------------------

I'm seeing random weirdness in the collation results.  the same query 
shift-refreshed sometimes yields (in json)


{noformat}
{
 "responseHeader":{
    "params":{
        "spellcheck":"true",
        "q":"redbull air show",
        "qf":"search-en",
        "spellcheck.collate":"true",
        "qt":"dismax",
        "wt":"json",
        "rows":"0"}},
 "response":{"numFound":0,"start":0,"docs":[]
 },
 "spellcheck":{
  "suggestions":[
        "redbull",[
         "numFound",1,
         "startOffset",0,
         "endOffset",7,
         "suggestion",["redbelly"]],
        "show",[
         "numFound",1,
         "startOffset",12,
         "endOffset",16,
         "suggestion",["shot"]],
        "collation","redbelly airshotw"]}}
{noformat}

note the "collation" spacing and extraneous 'w'.  a refresh toggles between 
that and what you might expect :

{noformat}
"collation","redbelly air shot"]
{noformat}

--Geoff

> Spell Checker as a Search Component
> -----------------------------------
>
>                 Key: SOLR-572
>                 URL: https://issues.apache.org/jira/browse/SOLR-572
>             Project: Solr
>          Issue Type: New Feature
>          Components: spellchecker
>    Affects Versions: 1.3
>            Reporter: Shalin Shekhar Mangar
>            Assignee: Grant Ingersoll
>            Priority: Minor
>             Fix For: 1.3
>
>         Attachments: SOLR-572.patch, SOLR-572.patch, SOLR-572.patch, 
> SOLR-572.patch, SOLR-572.patch, SOLR-572.patch, SOLR-572.patch, 
> SOLR-572.patch, SOLR-572.patch, SOLR-572.patch, SOLR-572.patch, 
> SOLR-572.patch, SOLR-572.patch, SOLR-572.patch, SOLR-572.patch, 
> SOLR-572.patch, SOLR-572.patch, SOLR-572.patch, SOLR-572.patch, 
> SOLR-572.patch, SOLR-572.patch, SOLR-572.patch, SOLR-572.patch, 
> SOLR-572.patch, SOLR-572.patch, SOLR-572.patch
>
>
> http://wiki.apache.org/solr/SpellCheckComponent
> Expose the Lucene contrib SpellChecker as a Search Component. Provide the 
> following features:
> * Allow creating a spell index on a given field and make it possible to have 
> multiple spell indices -- one for each field
> * Give suggestions on a per-field basis
> * Given a multi-word query, give only one consistent suggestion
> * Process the query with the same analyzer specified for the source field and 
> process each token separately
> * Allow the user to specify minimum length for a token (optional)
> Consistency criteria for a multi-word query can consist of the following:
> * Preserve the correct words in the original query as it is
> * Never give duplicate words in a suggestion

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