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https://issues.apache.org/jira/browse/SOLR-1694?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12796071#action_12796071
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Ryan McKinley commented on SOLR-1694:
-------------------------------------

The use case (mine anyway) is for implementing a Graph structure with Documents.

Consider three documents:
{code}
id: A
links: B
links: C
{code}

{code}
id: B
links: C
{code}

{code}
id: C
{code}

Now, i need to find the documents with the most links.  That is:
A = 0
B = 1  (A)
C = 2  (A and B)

> DocFrequencyValueSource
> -----------------------
>
>                 Key: SOLR-1694
>                 URL: https://issues.apache.org/jira/browse/SOLR-1694
>             Project: Solr
>          Issue Type: New Feature
>          Components: search
>            Reporter: Ryan McKinley
>            Priority: Minor
>
> A ValueSource to expose the document frequency for a given field.

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