NGSI-LD entities

This custom node is a simple node that allows to obtain NGSI-LD entities.

Properties

Property	Description
Name	A name for a node instance
Broker	An endpoint of a context broker
Representation	`normalized`, `concise` or `keyValues`
Entity id	Id of the entity to retrieve
Entity type	Types of the entity to retrieve
ID pattern	Regular expression that shall be matched by entity ids
Attributes	Comma separated list fo attribute names
System attrs	`true` or `false`
Query	Filter out entities by attribute values
CSF	Context source fileter
Geo relationship	Geo relationship of geoquery
Geometry	Geometry of geoquery
Coordinates	Coordinates of geoquery
Geo property	The name of the Property that contains the geospatial data
Geometry property	GeoProperty Name
Language	The preferred natural language of the response
Accept	`JSON-LD`, `JSON` or `GeoJSON`
@context	NGSI-LD @context
Buffering	`off` or `on`
Decode forbidden chars	`off` or `on`

Input

Payload JSON Object

A msg.payload should contain a query condition to retrieves NGSI-LD entitites. The values in the payload may overwrite properties.

Name	Data type	Description
representation	string	`normalizaed`, `concise` or `keyValues`
id	string	Entity types to retrieve
type	string	Comma separated list of entity types to retrieve
idPattern	string	Regular expression that shall be matched by entity ids
attrs	string	Comma separated list of attribute names
sysAttrs	boolean	`true` or `false`
q	string	Filter out entities by attribute values
csf	string	Context source fileter
georel	string	Geo relationship of geoquery
geometry	string	Geometry of geoquery
coordinates	string	Coordinates of geoquery
geoproperty	string	The name of the Property that contains the geospatial data
geometryProperty	string	GeoProperty Name
lang	string	The preferred natural language of the response
accept	string	`application/ld+json`, `application/json` or `application/geo+json`
forbidden	boolean	`true` or `false`

{
  "idPattern": ".*",
  "type": "T",
  "attrs": "humidity",
  "q": "temperature>29",
  "keyValues": true
}

Output

payload JSON Array

A msg.payload contains NGSI-LD entities.

[ { "id": "urn:ngsi-ld:TemperatureSensor:001", "type": "TemperatureSensor", "category": "sensor", "temperature": 25, "location": { "type": "Point", "coordinates": [ -73.975, 40.775556 ] } } ]


statusCode *Number*

A `msg.statusCode` contains a status code.