Elasticsearch

Index

Search

GeoNetwork-UI provides multiple pathways to retrieve records based on specific criteria: Main Search, Suggestion Search (autocomplete), and Similar Record Search.

Note: This documentation excludes search by organization, which functions as an exact match search.

All search requests are routed to GeoNetwork/ElasticSearch.

1. Main Search

Query Type: query_string

This is the primary search function. It queries the following fields with specific importance weightings (boosts):

Target Field	Boost Value
Title	5
Keywords	4
Abstract	3
Lineage	2
All Fields	1
UUID	1

Source Definition:

• geonetwork-ui/libs/api/repository/src/lib/gn4/elasticsearch/elasticsearch.service.ts
  • buildPayloadQuery
• geonetwork-ui/libs/api/repository/src/lib/gn4/elasticsearch/constant.ts
  • ES_QUERY_FIELDS_PRIORITY

2. Suggestion Search (Autocomplete)

Query Type: multi_match (type: bool_prefix)

Used for autocomplete functionality. It prioritizes the title significantly but excludes general fields and lineage.

Target Field	Boost Value
Title	4
Abstract	3
Keywords	2
Resource Identifier	1

Source Definition:

• geonetwork-ui/libs/api/repository/src/lib/gn4/elasticsearch/elasticsearch.service.ts
  • buildAutocompletePayload

3. Similar Record Search

Query Type: more_like_this

This search generates a list of related records. It operates by creating a "virtual document" containing only the specific fields listed below and comparing this virtual document against all documents indexed by ElasticSearch.

Fields considered:

• Title
• Abstract
• Keywords

Source Definition:

• geonetwork-ui/libs/api/repository/src/lib/gn4/elasticsearch/elasticsearch.service.ts
  • getRelatedRecordPayload