Mapper Plugins

Mapper plugins allow new field datatypes to be added to Elasticsearch.

Core mapper plugins

The core mapper plugins are:

Mapper Size Plugin
The mapper-size plugin provides the _size meta field which, when enabled, indexes the size in bytes of the original _source field.
Mapper Murmur3 Plugin
The mapper-murmur3 plugin allows hashes to be computed at index-time and stored in the index for later use with the cardinality aggregation.