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https://issues.apache.org/jira/browse/SOLR-18023?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Isabelle Giguere updated SOLR-18023:
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Summary: Field type that has key-value pairs as field value (i.e.: mapping
field) (was: Field type that has key-value pairs as field value)
> Field type that has key-value pairs as field value (i.e.: mapping field)
> ------------------------------------------------------------------------
>
> Key: SOLR-18023
> URL: https://issues.apache.org/jira/browse/SOLR-18023
> Project: Solr
> Issue Type: New Feature
> Affects Versions: 9.10, 10.0, main(11.0)
> Reporter: Isabelle Giguere
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> *The Problem*
> In some use cases, it would be useful to group key-value pairs in a single
> field value.
> For example, when passing a document to a classification engine, the
> document's metadata may contain the classification taxonomy, classifications
> or topics from that taxonomy, each with a relevance or confidence score from
> the engine.
> Example from:
> https://www.iptc.org/std/NewsCodes/treeview/mediatopic/mediatopic-en-GB.html
> Taxonomy: IPTC
> Topics:
> - health: relevance=78.9
> - education: relevance=62.4
> - environment: relevance=85.4
> This could be represented in Solr as individual "float" type fields, but in
> this case, if more than one taxonomy is applied to the document, the relation
> to the taxonomy for each metadata is lost and the indexed metadata becomes
> unusable:
> {code:xml}
> <float name="health">78.9</float>
> <float name="education">62.4</float>
> <float name="environment">85.4</float>
> {code}
> *Improvement*
> A new type of field to group key-value pairs in a single field value:
> {code:xml}
> <arr name="IPTC">
> <mapping>
> <str name="key">health</str>
> <float name="value">78.9</float>
> </mapping>
> <mapping>
> <str name="key">health</str>
> <float name="value">78.9</float>
> </mapping>
> <mapping>
> <str name="key">environment</str>
> <float name="value">85.4</float>
> </mapping>
> </arr>
> {code}
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