Simplified Semantic Sensor Network vocabulary partially based upon the Semantic Sensor Network Ontology from the W3C.
A full implementation of the SSN vocabulary may not be suitable for some sensor networks where the overhead of a complete OWL ontology imposes several restrictions on information exchange, performance and interoperability in common web of things environments.
The RDF representation of the vocabulary defined by this document uses the
namespace https://imergo.com/ns/2015/s3n#. The prefix s3n is used
throughout this document to denote this namespace. Other prefixes used
here include:
| Namespace | Prefix | Description |
|---|---|---|
| http://purl.org/dc/terms/ | dct | Dublin Core Terms namespace |
| http://www.w3.org/1999/02/22-rdf-syntax-ns# | rdf | RDF namespace |
| http://www.w3.org/2000/01/rdf-schema# | rdfs | RDF Schema namespace |
| http://www.w3.org/2001/XMLSchema# | xsd | XML Schema namespace |
| Class Name | Label | Description | Related Properties |
|---|---|---|---|
| s3n:Device | Device | A device is a physical piece of technology - a system in a box. Devices may of course be built of smaller devices and software components (i.e. systems have components). | dct:title dct:description dct:hasPart |
| s3n:Sensor | Sensor | Sensors may be physical devices, computational methods, a laboratory setup with a person following a method, or any other thing that can follow a method to observe a property. | s3n:observes s3n:detects s3n:hasMeasurementCapability |
| s3n:Observation | Observation | A situation in which a Sensing method has been used to estimate or calculate a value of a Property. | s3n:observedBy s3n:observedProperty s3n:observationResult dct:includesEvent s3n:observationResultTime |
| s3n:SensorInput | SensorInput | An Event in the real world that 'triggers' the sensor | |
| s3n:SensorOutput | SensorOutput | A sensor outputs a piece of information, the value itself being represented by an ObservationValue | s3n:isProducedBy s3n:hasValue |
| s3n:Condition | Condition | Used to specify ranges for qualities that act as conditions on a system/sensor's operation | |
| s3n:MeasurementCapability | Measurement Capability | Collects together measurement properties and the environmental conditions in which those properties hold | s3n:hasCondition s3n:hasMeasurementProperty |
| s3n:ObservationValue | Observation Value | The value of the result of an Observation | |
| s3n:MeasurementProperty | Measurement Property | An identifiable and observable characteristic of a sensor's observations or ability to make observations | |
| s3n:Accuracy | Accuracy | The closeness of agreement between the value of an observation and the true value of the observed quality | |
| s3n:Frequency | Frequency | The smallest possible time between one observation and the next | |
| s3n:Precision | Precision | The closeness of agreement between replicate observations on an unchanged or similar quality value | |
| s3n:Resolution | Resolution | The smallest difference in the value of a quality being observed that would result in perceptably different values of observation results | |
| s3n:ResponseTime | Response Time | The time between a change in the value of an observed quality and a sensor 'settling' on an observed value. | |
| s3n:Sensitivity | Sensitivity | Sensitivity is the quotient of the change in a result of sensor and the corresponding change in a value of a quality being observed |
- Label: Device (
https://imergo.com/ns/2015/s3n#Device) - Description: A device is a physical piece of technology - a system in a box. Devices may of course be built of smaller devices and software components (i.e. systems have components).
- Domain of:
- Range of:
- Related properties:
- dct:title
- dct:description
- dct:hasPart
- Label: Sensor (
https://imergo.com/ns/2015/s3n#Sensor) - Description: Sensors may be physical devices, computational methods, a laboratory setup with a person following a method, or any other thing that can follow a method to observe a property
- Domain of:
- Range of:
- Related properties:
- dct:title
- dct:description
- dct:hasPart
An Observation is a Situation in which a Sensing method has been used to estimate or calculate a value of a Property.
Used to specify ranges for qualities that act as conditions on a system/sensor's operation
The value of the result of an Observation. An Observation has a result which is the output of some sensor, the result is an information object that encodes some value for a Feature.
Collects together measurement properties (accuracy, range, precision, etc) and the environmental conditions in which those properties hold, representing a specification of a sensor's capability in those conditions.
An identifiable and observable characteristic of a sensor's observations or ability to make observations.
An Event in the real world that 'triggers' the sensor.
A sensor outputs a piece of information (an observed value), the value itself being represented by an ObservationValue.
An observable Quality of an Event or Object.
The closeness of agreement between the value of an observation and the true value of the observed quality.
The smallest possible time between one observation and the next.
The closeness of agreement between replicate observations on an unchanged or similar quality value: i.e., a measure of a sensor's ability to consitently reproduce an observation.
The smallest difference in the value of a quality being observed that would result in perceptably different values of observation results.
The time between a (step) change in the value of an observed quality and a sensor (possibly with specified error) 'settling' on an observed value.
Sensitivity is the quotient of the change in a result of sensor and the corresponding change in a value of a quality being observed.
| Property Name | Label | Domain | Range |
|---|---|---|---|
| s3n:detects | detects | s3n:Sensor | s3n:SensorInput |
| s3n:observes | Sensor | s3n:Sensor | s3n:Property |
| s3n:hasMeasurementCapability | hasMeasurementCapability | s3n:Sensor | s3n:MeasurementCapability |
| s3n:observedProperty | observedProperty | s3n:Observation | s3n:Property |
| s3n:observationResult | observationResult | s3n:Observation | s3n:SensorOutput |
| s3n:isProducedBy | isProducedBy | s3n:SensorOutput | s3n:Sensor |
| s3n:observedBy | observedBy | s3n:Observation | s3n:Sensor |
| s3n:hasMeasurementProperty | hasMeasurementProperty | s3n:MeasurementCapability | s3n:MeasurementProperty |
A relation from a sensor to the Stimulus(input) that the sensor can detect.
- Domain: s3n:Sensor
- Range: s3n:SesorInput
Relation between a Sensor and a Property that the sensor can observe.
- Domain: s3n:Sensor
- Range: s3n:Property
Relation from a Sensor to a MeasurementCapability describing the measurement properties of the sensor.
- Domain: s3n:Sensor
- Range: s3n:MeasurementCapability
Relation linking an Observation to the Property that was observed.
- Domain: s3n:Observation
- Range: s3n:Property
Relation linking an Observation (i.e., a description of the context, the Situation, in which the observatioin was made) and a Result, which contains a value representing the value associated with the observed Property.
- Domain: s3n:Observation
- Range: s3n:SensorOutput
Relation between a producer and a produced entity: for example, between a sensor and the produced output.
- Domain: s3n:SensorOutput
- Range: s3n:Sensor
Relation between an Observation and Sensor.
- Domain: s3n:Observation
- Range: s3n:Sensor
Relation from a MeasurementCapability to a MeasurementProperty:
- Domain: s3n:MeasurementCapability
- Range: s3n:MeasurementProperty