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https://issues.apache.org/jira/browse/SOLR-5254?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14118408#comment-14118408
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Erick Erickson commented on SOLR-5254:
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bq: ...but i think there's still a fair bit of work to do...
No doubt about it at all, I consider what I did for SOLR-5896 as the bare
minimum of a _start_ on update processors but got daunted by doing everything
that should be done. It was a holiday weekend after all ;)...
IMO in addition to a good explanation of where update processors fit in the
architecture, it would be good to have a limited use-case (or perhaps example
transformation) for each of the update processors. Some kind of explanation of
just how simple a document is at that point (i.e. it's just a set of key/value
pairs), and some bits explaining how to deal with multiValued fields at this
level.
> ref guide needs page/section on update processor chains
> -------------------------------------------------------
>
> Key: SOLR-5254
> URL: https://issues.apache.org/jira/browse/SOLR-5254
> Project: Solr
> Issue Type: Improvement
> Components: documentation
> Reporter: Hoss Man
> Priority: Minor
>
> update processor chans have never really been explained in the ref guide,
> just mentioned little bits here and there in the context of functionality
> that uses/depend on a spcitic update processor.
> we should probably have a cohesive page (under
> https://cwiki.apache.org/confluence/display/solr/Indexing+and+Basic+Data+Operations
> i would think) introducing hte concept and mentioning some of the "general"
> update processors (ie: the field mutators, the UUIDUpdateProcessor, etc...),
> and then back link to it for an explanation from some of hte other pages
> where processors are mentioned...
> * https://cwiki.apache.org/confluence/display/solr/UIMA+Integration
> *
> https://cwiki.apache.org/confluence/display/solr/Detecting+Languages+During+Indexing
> * https://cwiki.apache.org/confluence/display/solr/De-Duplication
> etc...
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