32 lines
775 B
Plaintext
32 lines
775 B
Plaintext
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[[mapping-field-meta]]
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=== `meta`
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Metadata attached to the field. This metadata is opaque to Elasticsearch, it is
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only useful for multiple applications that work on the same indices to share
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meta information about fields such as units
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[source,console]
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------------
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PUT my_index
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{
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"mappings": {
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"properties": {
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"latency": {
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"type": "long",
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"meta": {
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"unit": "ms"
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}
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}
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}
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}
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}
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------------
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// TEST
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NOTE: Field metadata enforces at most 5 entries, that keys have a length that
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is less than or equal to 20, and that values are strings whose length is less
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than or equal to 50.
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NOTE: Field metadata is updatable by submitting a mapping update. The metadata
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of the update will override the metadata of the existing field.
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