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https://github.com/webcc/s3n

Simple Semantic Sensor Network (s3n)
https://github.com/webcc/s3n

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Simple Semantic Sensor Network (s3n)

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# Simple Semantic Sensor Network (s3n)



Simplified Semantic Sensor Network vocabulary partially based upon the 

[Semantic Sensor Network Ontology](http://purl.oclc.org/NET/ssnx/ssn) 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.



## Introduction



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 |



## Classes



| Class Name | Label | Description | Related Properties |

| ---------- | ----- | ----------- | ------------------ |

| **[s3n:Device](#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)** | 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](#observes) 
 [s3n:detects](#detects) 
 [s3n:hasMeasurementCapability](#hasMeasurementCapability) |

| [s3n:Observation](#Observation) | Observation |A situation in which a Sensing method has been used to estimate or calculate a value of a Property. | [s3n:observedBy](#observedBy) 
[s3n:observedProperty](#observedProperty) 
[s3n:observationResult](#observationResult) 
[dct:includesEvent](http://www.loa-cnr.it/ontologies/DUL.owl#includesEvent) 
[s3n:observationResultTime](#observationResultTime)

| [s3n:SensorInput](#SensorInput) | SensorInput |An Event in the real world that 'triggers' the sensor| 

| [s3n:SensorOutput](#SensorOutput) | SensorOutput |A sensor outputs a piece of information, the value itself being represented by an ObservationValue| [s3n:isProducedBy](#isProducedBy) 
[s3n:hasValue](#hasValue) 

| [s3n:Condition](#Condition) | Condition |Used to specify ranges for qualities that act as conditions on a system/sensor's operation| 

| [s3n:MeasurementCapability](#MeasurementCapability) |Measurement Capability|Collects together measurement properties and the environmental conditions in which those properties hold| [s3n:hasCondition](#hasCondition) 
[s3n:hasMeasurementProperty](#hasCondition)

| [s3n:ObservationValue](#ObservationValue)| Observation Value |The value of the result of an Observation| 

| [s3n:MeasurementProperty](#MeasurementProperty)| Measurement Property|An identifiable and observable characteristic of a sensor's observations or ability to make observations| 

| [s3n:Accuracy](#Accuracy) | Accuracy |The closeness of agreement between the value of an observation and the true value of the observed quality| | 

| [s3n:Frequency](#Frequency) | Frequency |The smallest possible time between one observation and the next| |

| [s3n:Precision](#Precision) | Precision |The closeness of agreement between replicate observations on an unchanged or similar quality value| |

| [s3n:Resolution](#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](#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 |Sensitivity is the quotient of the change in a result of sensor and the corresponding change in a value of a quality being observed| |



Device



- **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



Sensor



- **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



Observation



An Observation is a Situation in which a Sensing method has been used to estimate or calculate a value of a Property. 



Condition



Used to specify ranges for qualities that act as conditions on a system/sensor's operation



ObservationValue



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.



MeasurementCapability



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. 



MeasurementProperty



An identifiable and observable characteristic of a sensor's observations or ability to make observations.



SensorInput



An Event in the real world that 'triggers' the sensor. 



SensorOutput



A sensor outputs a piece of information (an observed value), the value itself being represented by an ObservationValue.



Property



An observable Quality of an Event or Object.



Accuracy



The closeness of agreement between the value of an observation and the true value of the observed quality.



Frequency



The smallest possible time between one observation and the next.



Precision



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.



Resolution



The smallest difference in the value of a quality being observed that would result in perceptably different values of observation results.



ResponseTime



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



Sensitivity is the quotient of the change in a result of sensor and the corresponding change in a value of a quality being observed.



## Properties



| Property Name | Label | Domain | Range |

| ------------- | ----- | ------ | ----- |

| [s3n:detects](#detects) | detects | [s3n:Sensor](#Sensor) | [s3n:SensorInput](#SensorInput) |

| [s3n:observes](#observes) | Sensor | [s3n:Sensor](#Sensor) | [s3n:Property](#Property) |

| [s3n:hasMeasurementCapability](#hasMeasurementCapability) | hasMeasurementCapability | [s3n:Sensor](#Sensor) | [s3n:MeasurementCapability](#MeasurementCapability) |

| [s3n:observedProperty](#observedProperty) | observedProperty | [s3n:Observation](#Observation) | [s3n:Property](#Property) |

| [s3n:observationResult](#observationResult) | observationResult | [s3n:Observation](#Observation) | [s3n:SensorOutput](#Output) |

| [s3n:isProducedBy](#isProducedBy) | isProducedBy | [s3n:SensorOutput](#SensorOutput) | [s3n:Sensor](#Sensor) |

| [s3n:observedBy](#observedBy) | observedBy | [s3n:Observation](#Observation) | [s3n:Sensor](#Sensor) |

| [s3n:hasMeasurementProperty](#hasMeasurementProperty) | hasMeasurementProperty | [s3n:MeasurementCapability](#MeasurementCapability) | [s3n:MeasurementProperty](#MeasurementProperty) |

 

detects



A relation from a sensor to the Stimulus(input) that the sensor can detect.



- Domain: [s3n:Sensor](#Sensor)

- Range: [s3n:SesorInput](#SensorInput)



observes



Relation between a Sensor and a Property that the sensor can observe.



- Domain: [s3n:Sensor](#Sensor)

- Range: [s3n:Property](#Property)



hasMeasurementCapability



Relation from a Sensor to a MeasurementCapability describing the measurement properties of the sensor.



- Domain: [s3n:Sensor](#Sensor)

- Range: [s3n:MeasurementCapability](#MeasurementCapability)



observedProperty



Relation linking an Observation to the Property that was observed.



- Domain: [s3n:Observation](#Observation)

- Range: [s3n:Property](#Property)



observationResult



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](#Observation)

- Range: [s3n:SensorOutput](#SensorOutput)



isProducedBy



Relation between a producer and a produced entity: for example, between a

 sensor and the produced output.

 

- Domain: [s3n:SensorOutput](#SensorOutput)

- Range: [s3n:Sensor](#Sensor)



observedBy



Relation between an Observation and Sensor.



- Domain: [s3n:Observation](#Observayion)

- Range: [s3n:Sensor](#Sensor)



hasMeasurementProperty



Relation from a MeasurementCapability to a MeasurementProperty:



- Domain: [s3n:MeasurementCapability](#MeasurementCapability)

- Range: [s3n:MeasurementProperty](#MeasurementProperty)