Field types (also CALLED field data types) describe the type of information or data a field contains, such as a string or boolean, and its intended use. The following are some data types for document fields:

Common data types:

• Binary: A binary value that is encoded as a BASE64 string.
• Boolean: A true or false value.
• Keywords: The keyword family, which includes the keyword, constant keyword, and wildcard.
• Numbers: Numeric types such as long, double, float, bytes, integer, etc.
• Dates: Date types, such as date_nano, date.
• Alias: Represents the alias of an existing field.

Objects and relational types:

• Object: Represent a JSON object.
• Nested: A JSON object that maintains a relationship between its subfields.
• Flattened: An entire JSON object represented by a single field value.\
• Join: Establishes a parent/child relationship between documents WITHIN an index.

Structured and Spatial data types:

• Range: Range types, like date_range, long_range, float_range, double_range, and IP_range.
• Point: Arbitrary cartesian points.
• Geo_point: Longitude and latitude points
• Shape: Arbitrary cartesian geometries.
• Geo_shape: COMPLEX shapes like POLYGONS.