Isabelle Giguere created SOLR-18023:
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Summary: Field type that has key-value pairs as field value
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
*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:
<float name="health">78.9</float>
<float name="education">62.4</float>
<float name="environment">85.4</float>
*Improvement*
A new type of field to group key-value pairs in a single field value:
<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>
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