Standard Analyzer
The standard analyzer is the default for all Atlas Search indexes and
queries. It divides text into terms based on word boundaries, which
makes it language-neutral for most use cases. It converts all terms
to lower case and removes punctuation. It provides grammar-based
tokenization that recognizes email addresses, acronyms,
Chinese-Japanese-Korean characters, alphanumerics, and more.
Example
The following example index definition specifies an index on
the summary field using the standard analyzer:
{ "mappings": { "fields": { "summary": { "type": "string", "analyzer": "lucene.standard" } } } }
Consider a collection named cases with the following documents:
{ "_id": 1, "summary": "No action required at this time." } { "_id": 2, "summary": "Case set aside for future action." } { "_id": 3, "summary": "Ready for planning." }
The following query uses the index on the summary field:
db.cases.aggregate([ { $search: { "text": { "query": "action", "path": "summary" } } } ])
The above query returns the following results:
{ "_id" : 1, "summary" : "No action required at this time." } { "_id" : 2, "summary" : "Case set aside for future action." }