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https://issues.apache.org/jira/browse/OAK-5692?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15871280#comment-15871280
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Chetan Mehrotra commented on OAK-5692:
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{quote}
For things something like the PatternReplaceCharFilterFactory [3], how do you
define multiple pattern mappings, as IIUC the charFilter node MUST be named:
{noformat}.../charFilters/PatternReplace{noformat} so you can't have multiple
"PatternReplace" named nodes, each with its own "@pattern" and "@replace"
properties. It seems like there is only support for a single object for each
Factory type?
{quote}
That appears to be Oak level limitation. Did not anticipated that. Can you open
an Oak issue for that? Should be easy to support
> Oak Lucene analyzers docs unclear on viable configurations
> ----------------------------------------------------------
>
> Key: OAK-5692
> URL: https://issues.apache.org/jira/browse/OAK-5692
> Project: Jackrabbit Oak
> Issue Type: Documentation
> Reporter: David Gonzalez
>
> The Oak lucene docs [1] > Analyzers section would benefit from clarification:
> Combining analyzer-based topics into a single ticket
> * If no analyzer is specified, what analyzer setup is used (at the vert least
> some tokenizer must be used)
> * The docs mention the "default" analyzer
> ([oak:queryIndexDefinition]/analyzers/default). Can other analyzers be
> defined? How are they selected for use? is the selection configurable?
> * By default is the analyzer index AND query time, unless specified by
> `type=index|query` property?
> * What is the naming for multiple analyzer nodes? Are all children of
> analyzers assumed to be an analyzer? Ex. If i want a special configuration or
> index and another for query, could i create:
> {noformat}
> ../myIndex/analyzers/indexAnalyzer@type=index
> .. define the index-time analyzer ...
> ../myIndex/analyzers/queryAnalyzer@type=query
> .. define the query-time analyzer ...
> {noformat}
> * How are languages handled? Ex. language specific stop words, synonyms, char
> mapping, and Stemming.
> * If
> [oak:queryIndexDefinition]/analyzers/default@class=org.apache.lucene.analysis.standard.StandardAnalyzer
> it appears the Standard Tokenizer and Standard Lowercase and Stop Filters
> are used. The Stop filter can be augmented w the well-named stopwords file.
> ** Can other charFilters/filters be layered on top of this "named" Analyzer
> (it seems not).
> * When the Stop Filter is used it provided the OOTB language-based stop
> words. If a custom stopwords file is provided, that list replaced the OOTB
> lang-based, requiring the developer to provide their own language based Stop
> words. Is this correct? This should be called out and link out to the catalog
> of OOTB stopword txt files for easy inclusion)
> * The Stop filters words property must be a String not String[] and the value
> is a comma delimited String value. Would be good to call this out.
> * What are all the CharFilters/Filters available? Is there a concise list w/
> their params? (Ex. i think the PorterStem might support and ignoreCase param?)
> * Synonym Filter syntax is unclear; It seems like here are 2 formats;
> directional x -> y and bi-directional (comma delimited); i could only get the
> latter to work.
> * Are all the options in the link [2] supported. Its unclear if there is a
> 1:1 between oak lucene and solr's capabilities or if [2] is a loose example
> of the "types" of supported analyzers.
> * For things something like the PatternReplaceCharFilterFactory [3], how do
> you define multiple pattern mappings, as IIUC the charFilter node MUST be
> named:
> {noformat}.../charFilters/PatternReplace{noformat} so you can't have multiple
> "PatternReplace" named nodes, each with its own "@pattern" and "@replace"
> properties. It seems like there is only support for a single object for each
> Factory type?
> Generally this seems like the handiest resource:
> https://cwiki.apache.org/confluence/display/solr/Understanding+Analyzers%2C+Tokenizers%2C+and+Filters
> [1] http://jackrabbit.apache.org/oak/docs/query/lucene.html
> [2]
> https://wiki.apache.org/solr/AnalyzersTokenizersTokenFilters#Specifying_an_Analyzer_in_the_schema
> [3] https://cwiki.apache.org/confluence/display/solr/CharFilterFactories
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