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Mapper Plugins

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

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.
Mapper Annotated Text Plugin: The annotated text plugin provides the ability to index text that is a combination of free-text and special markup that is typically used to identify items of interest such as people or organisations (see NER or Named Entity Recognition tools).