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https://issues.apache.org/jira/browse/SOLR-2338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13013652#comment-13013652
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Robert Muir commented on SOLR-2338:
-----------------------------------

I agree with your order, i think to keep the example simple we should just have 
a commented out example for a fieldType that customizes its similarity?

I think we can support customizing the similarityprovider (in case you want to 
change how coord is calculated), and support changing the 
default-unless-otherwise-specified-in-the-schema similarity (for easier 
backwards transition), but I'm thinking it would be actually more confusing 
than helpful to advertise these in the example.


> improved per-field similarity integration into schema.xml
> ---------------------------------------------------------
>
>                 Key: SOLR-2338
>                 URL: https://issues.apache.org/jira/browse/SOLR-2338
>             Project: Solr
>          Issue Type: Improvement
>          Components: Schema and Analysis
>    Affects Versions: 4.0
>            Reporter: Robert Muir
>            Assignee: Robert Muir
>         Attachments: SOLR-2338.patch, SOLR-2338.patch
>
>
> Currently since LUCENE-2236, we can enable Similarity per-field, but in 
> schema.xml there is only a 'global' factory
> for the SimilarityProvider.
> In my opinion this is too low-level because to customize Similarity on a 
> per-field basis, you have to set your own
> CustomSimilarityProvider with <similarity class=.../> and manage the 
> per-field mapping yourself in java code.
> Instead I think it would be better if you just specify the Similarity in the 
> FieldType, like after <analyzer>.
> As far as the example, one idea from LUCENE-1360 was to make a "short_text" 
> or "metadata_text" used by the
> various metadata fields in the example that has better norm quantization for 
> its shortness...

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