MarkLogic Server 11.0 Product Documentationentity:extract
entity:extract( $node as node(), [$dictionaries as cts:entity-dictionary*], [$options as xs:string*], [$map as map:map] ) as element()*
Summary
Extract entities from a document using the provided entity dictionary. The matching entities are returned.
Usage Notes
Mapping can be done piecemeal. The type of an entity is split into
segments, delimited by a colon, and then each segment is matched in
turn against map until a match is found. If the value of
a segment matches a mapping entry whose value is itself a map, then that
submap is used to match subsequent segments of the type. If the submap
contains no match, then the empty string is used to find a match within
the submap.
The default map defines a set of default recommended entity names:
e:credit-card-number- A number representing a credit card number.
(
IDENTIFIER:CREDIT_CARD_NUM) e:coordinate- Latitude and longitude coordinates.
(
IDENTIFIER:LATITUDE_LONGITUDE) -
e:date - Date-related. (
TEMPORAL:DATE) -
e:distance - A distance. (
IDENTIFIER:DISTANCE) -
e:email - An email address. (
IDENTIFIER:EMAIL) -
e:gpe - Geo-political entity. Differs from location in that it has a
person-made aspect to it. For example, California is a GPE because
its boundaries were defined by a government). (
GPE) -
e:facility - A place used as a facility. (
FACILITY) -
e:id - A number identifying a social security number or other ID number.
(
IDENTIFIER) -
e:location - A geographic location. For example, Mount Everest.
(
LOCATION) -
e:money - Currency, such as dollars, euros, and so on.
(
IDENTIFIER:MONEY) -
e:nationality - The nationality of someone or something. For example, American.
(
NATIONALITY) -
e:number - A number. (
IDENTIFIER:NUMBER) -
e:organization - An organization. (
ORGANIZATION) -
e:person - A person. (
PERSON) -
e:phone-number - A number identifying a telephone number.
(
IDENTIFIER:PHONE_NUMBER) -
e:religion - A religion. (
RELIGION) -
e:title - A title or honorific. (
TITLE) -
e:url - A URL on the world wide web. (
IDENTIFIER:URL) -
e:utm - A point in the Universal Transverse Mercator (UTM) coordinate
system. (
IDENTIFIER:UTM) -
e:time - Time-related. (
TEMPORAL:TIME)
See Also
- Dictionary-Based Entity Extraction in the Search Developer's Guide
- Using an Entity Type Map for Extraction or Enrichment in the Search Developer's Guide
- cts:entity-walk
Example
(: extract entities, using the people ontology from the
: entity:dictionary-load example
:)
import module namespace entity="http://marklogic.com/entity"
at "/MarkLogic/entity.xqy";
let $map :=
map:new((
map:entry("",xs:QName("entity:entity")),
map:entry("administrative district",xs:QName("entity:gpe")),
map:entry("facilty",xs:QName("entity:facility")),
map:entry("person",xs:QName("entity:person")),
map:entry("land",xs:QName("entity:location")),
map:entry("location",xs:QName("entity:location")),
map:entry("organization",xs:QName("entity:organization")),
map:entry("region",xs:QName("entity:gpe"))
))
return
entity:extract(<p>Nixon went to Paris</p>,
cts:entity-dictionary-get("/ontology/people"), (), $map)
(: Returns the extracted entity(s). For example:
:
: <entity:person xmlns:entity="http://marklogic.com/entity">Nixon</entity:person>
: <entity:gpe xmlns:entity="http://marklogic.com/entity">Paris</entity:gpe>
: <entity:gpe xmlns:entity="http://marklogic.com/entity">Paris</entity:gpe>
: <entity:entity type="imaginary being:mythical being" xmlns:entity="http://marklogic.com/entity">Paris</entity:entity>
:)