原文地址: https://www.elastic.co/guide/en/elasticsearch/reference/7.7/term-vector.html, 原文档版权归 www.elastic.co 所有
IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.
Elasticsearch Guide [7.7] » Mapping » Mapping parameters » term_vector
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term_vectoredit

Term vectors contain information about the terms produced by the analysis process, including:

  • a list of terms.
  • the position (or order) of each term.
  • the start and end character offsets mapping the term to its origin in the original string.
  • payloads (if they are available) — user-defined binary data associated with each term position.

These term vectors can be stored so that they can be retrieved for a particular document.

The term_vector setting accepts:

no

No term vectors are stored. (default)

yes

Just the terms in the field are stored.

with_positions

Terms and positions are stored.

with_offsets

Terms and character offsets are stored.

with_positions_offsets

Terms, positions, and character offsets are stored.

with_positions_payloads

Terms, positions, and payloads are stored.

with_positions_offsets_payloads

Terms, positions, offsets and payloads are stored.

The fast vector highlighter requires with_positions_offsets. The term vectors API can retrieve whatever is stored.

Setting with_positions_offsets will double the size of a field’s index.

PUT my_index
{
  "mappings": {
    "properties": {
      "text": {
        "type":        "text",
        "term_vector": "with_positions_offsets"
      }
    }
  }
}

PUT my_index/_doc/1
{
  "text": "Quick brown fox"
}

GET my_index/_search
{
  "query": {
    "match": {
      "text": "brown fox"
    }
  },
  "highlight": {
    "fields": {
      "text": {} 
    }
  }
}

The fast vector highlighter will be used by default for the text field because term vectors are enabled.
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