SAREF4WEAR: an extension of SAREF for Wearables

Latest version:
https://saref.etsi.org/saref4wear/
Permanent IRI for this version (v1.1.1)
https://saref.etsi.org/saref4wear/v1.1.1/
Sources on the SAREF Forge
https://saref.etsi.org/sources/saref4wear/
Publication Date
2020-02-01
Last Modification Date
2020-06-06
Creators
Mauro Dragoni (Fondazione Bruno Kessler)
Raúl García-Castro (Universidad Politécnica de Madrid)
Ontology requirements and tests
requirements and tests
Prefix and namespace declaration:
Turtle: @prefix s4wear: <https://saref.etsi.org/saref4wear/> .
SPARQL: PREFIX s4wear: <https://saref.etsi.org/saref4wear/>
Download serialization:
License:

Introduction

This document presents the implementation of the SAREF extension for the wearables domain (SAREF4WEAR) which based on a limited set of use cases and from available existing data models. This work has been developed in the context of the STF 566 which was established with the goal to create SAREF extensions for the domains of automotive, eHealth and ageing well, wearables, and water.

General overview

Figure 1 presents an overview of the classes and the properties included in the SAREF4WEAR extension.

SAREF4WEAR overview
Figure 1: SAREF4WEA overview

Measurement

As it can be observed in Figure 2, the modelling of measurements in the SAREF4WEAR ontology mostly relies on the measurement model proposed in SAREF.

The SAREF4WEAR extension requires to be able to represent those devices that measure a certain feature of interest (and those features of interest that are measured by a device) independently of having measures from which this relationship could be inferred. Because of this, in this extension we have created four new properties to relate saref:Device and saref:FeatureOfInterest: s4wear:featureIsMeasuredByDevice, s4wear:featureIsControlledByDevice, s4wear:measuresFeature, and s4wear:controlsFeature.

Measurement model
Figure 2: Measurement model

Feature of interest

The Feature of Interest module describes the different actors that can be equipped with a Wearable device, as presented in Figure 3. We foresee different types of actors: living organisms (s4wear:LivingOrganism) and software (s4wear:Software). There is also a wearer class (s4wear:Wearer) to describe those living organisms that wear some wearable.

The s4wear:LivingOrganism concept represents any living being that can be equipped with a Wearable device. The s4wear:Software concept represents a program that can be linked with a s4wear:Wearable especially for acquiring information.

The s4wear:Wearer concept defines any saref:LivingOrganism for which the s4wear:featureIsMeasuredByDevice property subsists, i.e., the s4wear:Wearable device transmits information related to the connected saref:LivingOrganism.

The s4wear:User concept refers to a saref:FeatureOfInterest for which the s4wear:interactsWith relationship with a s4wear:Wearable individual exists.

Feature of interest model
Figure 3: Feature of interest model

Wearable

SAREF4WEAR defines the s4wear:Wearable abstract concept representing a saref:Device having the capability of being wore by a s4wear:Wearer.

As depicted in Figure 4, the s4wear:Wearable class subsumes three further concepts with information related to the position of the s4wear:Wearable with respect to its s4wear:Wearer:

The latter is furtherly specified with the s4wear:TextileBasedWearable concept describing s4wear:Wearable devices integrated into textile products directly.

The extension also allows to define for a wearable which are the policies (s4wear:Policy) followed by it by means of the s4wear:followsPolicy property.

Besides, the capabilities of a wearable under specific conditions (ssn-system:SystemCapability), such as its precision or accuracy, can be represented using the ssn-system:hasSystemCapability property.

Wearable model
Figure 4: Wearable model

Function

This model specifies the functions that are considered relevant for the wearables domain. We defined three new concepts that are subsumed by the saref:Function concept and we reuse other functions defined in SAREF, as presented in Figure 5:

Function model
Figure 5: Function model

Occurrence

In some cases, wearables will be able to detect occurrences (s4wear:Occurrence) taking place (s4wear:takesPlaceAt) in a location that is relevant to the wearer (geosp:Feature). These occurrences can be related to the device detecting them through the s4wear:isDetectedBy property, as shown in Figure 6.

In the context of a smart city, more specific classes can be used from SAREF4CITY, to represent events (s4city:Event, a subclass of s4wear:Occurrence) that take place at (s4city:takesPlaceAtFacility) facilities (s4city:Facility, a subclass of geosp:Feature).

Occurence model
Figure 6: Occurrence model

Property

SAREF4WEAR includes a classification of the different properties that are relevant to the wearables domain, as shown in Figure 7. These properties are classified into wearable (s4wear:WearableProperty), wearer (s4wear:WearerProperty), crowd (s4wear:CrowdProperty), and environment (s4wear:EnvironmentProperty) ones.

Furthermore, wearable properties are further classified into electrical one (s4wear:ElectricalProperty) that refer to the electric information of a wearable, electrical safety ones (s4wear:ElectricalSafetyProperty) that refer to safety information concerning electrical aspects of wearables, and emission one (s4wear:EmissionProperty) that refer to information about kind of emissions (e.g. noise, temperature, etc.) associated with a wearable.

The extension defines different individuals for each type of water property; however, this list of individuals does not aim to be exhaustive but to reflect the potential use of the ontology.

Property model
Figure 7: Property model

Wearable component

This model describes some of the components that could be integrated into a s4wear:Wearable device. We foresee different types of components, as depicted in Figure 8:

Wearable component model
Figure 8: Wearable component model

Examples

In a healthcare scenario the wearer is represented by a user equipped with wearable devices in charge of monitoring healthy parameters (e.g., heart rate, body temperature, blood oxygenation, etc.) and to inform the user in real-time about his/her status. This scenario can be instantiated into different situations ranging from the self-management of chronic diseases to the simple lifestyle monitor.

The example presented in Figure 9 depicts a wearer (ex:Patient1) who is equipped with a wearable (ex:AccuMed500) that contains a photodetector (ex:Photodetector1); the sensor measures oxygen saturation (ex:OxygenSaturation) through a measurement (ex:OxygenLevel97). A similar example is depicted for a runner wearing a heart rate monitor that measures heart rate.

Healthcare example
Figure 9: Healthcare example

Another scenario is that of open air public events, which refers to the description of open space public events, such as street festivals, by using the SAREF4WEAR extension. As an example, wearables and sensors are used for measuring the sound level limits, for equipping security staff with the necessary devices for receiving proper information, and for managing the crowd movements around the facility. The management of this challenge can be done by means of a network of wearable devices.

The example presented in Figure 10 illustrates an event (ex:MusicFestival2020) that takes place in a facility (ex:MusicFestival2020). The facility contains different sound sensors (ex:SoundSensor) and multiple customers (s4wear:User) who are located through individual GPS trackers (ex:GPSTracker). The example also presents a member of the staff (ex:Staff1) who interacts with a crowd control wearable (ex:Receiver1) that is able to measure queue sizes (s4wear:QueueSize); such wearable has detected the queue created by customers in the toilets (ex:ToiletsQueue).

Open air event example
Figure 10: Open air event example

The closed environment events scenario differs from the previous one due to the environment in which events take place. Here, sensors are used for controlling access, checking the presence of undesired situations (e.g., blazes), and for alerting attendees about emergency situations. At the same time, stewards and security staff members are equipped with wearables for managing communications and for being informed about undesired events (e.g., brawls). Moreover, children could be equipped with wearables for avoiding their loss in the event facility.

The example presented in Figure 11 illustrates an event (ex:VolleyLeagueFinals) that takes place in a facility (ex:ForumAssago). The facility contains different smoke sensors (ex:SmokeSensor) and multiple customers (s4wear:User) who are located through individual GPS trackers (ex:GPSTracker). The example also presents the head of the staff (ex:StaffHead) who interacts with an audio control wearable (ex:Controller1) that controls the speakers of the facility (ex:FacilitySpeaker1).

Closed environment event example
Figure 11: Closed environment event example

Namespace Declarations

schema:
http://schema.org/
default namespace:
https://saref.etsi.org/saref4wear/
s4city:
https://saref.etsi.org/saref4city/
owl:
http://www.w3.org/2002/07/owl#
saref:
https://saref.etsi.org/core/
xsd:
http://www.w3.org/2001/XMLSchema#
voaf:
http://purl.org/vocommons/voaf#
rdfs:
http://www.w3.org/2000/01/rdf-schema#
geo:
http://www.w3.org/2003/01/geo/wgs84_pos#
s4wear:
https://saref.etsi.org/saref4wear/
rdf:
http://www.w3.org/1999/02/22-rdf-syntax-ns#
geosp:
http://www.opengis.net/ont/geosparql#
xml:
http://www.w3.org/XML/1998/namespace/
s4syst:
https://saref.etsi.org/saref4syst/
dcterms:
http://purl.org/dc/terms/
vann:
http://purl.org/vocab/vann/
foaf:
http://xmlns.com/foaf/0.1/
ssn-system:
http://www.w3.org/ns/ssn/systems/

Classes

Biometric property back to ToC or Class ToC

IRI: https://saref.etsi.org/saref4wear/BiometricProperty

Class to group those properties related to the biometric characteristics of wearers.

Communicating function back to ToC or Class ToC

IRI: https://saref.etsi.org/saref4wear/CommunicatingFunction

A function that allows a device to communicate with another device.

has super-classes
saref:EventFunctionc

Controlling function back to ToC or Class ToC

IRI: https://saref.etsi.org/saref4wear/ControllingFunction

A function that allows to control a device from another device.

has super-classes
saref:Functionc

Crowd property back to ToC or Class ToC

IRI: https://saref.etsi.org/saref4wear/CrowdProperty

Class to group those properties related to crowds.

has super-classes
saref:Propertyc
has members
s4wear:CrowdSizeni, s4wear:QueueSizeni

Electrical property back to ToC or Class ToC

IRI: https://saref.etsi.org/saref4wear/ElectricalProperty

Class to group those electrical properties related to wearables.

has super-classes
s4wear:WearablePropertyc
has members
s4wear:BatteryRemainingTimeni

Electrical safety property back to ToC or Class ToC

IRI: https://saref.etsi.org/saref4wear/ElectricalSafetyProperty

Class to group those electrical safety properties related to wearables.

has super-classes
s4wear:WearablePropertyc

Emission property back to ToC or Class ToC

IRI: https://saref.etsi.org/saref4wear/EmissionProperty

Class to group those emission properties related to wearables.

Environmental property back to ToC or Class ToC

IRI: https://saref.etsi.org/saref4wear/EnvironmentalProperty

Class to group those properties related to the environment of a wearer.

Fabric wearable back to ToC or Class ToC

IRI: https://saref.etsi.org/saref4wear/FabricWearable

A fabric wearable is a fabric integrating the sensors directly into its fibers.

has super-classes
s4wear:TextileBasedWearablec

In-body wearable back to ToC or Class ToC

IRI: https://saref.etsi.org/saref4wear/InBodyWearable

An in-body wearable is a wearable located inside a physical body.

has super-classes
s4wear:Wearablec and (s4wear:isLocatedInop some s4wear:Wearerc)
is in domain of
s4wear:isLocatedInc

Interface back to ToC or Class ToC

IRI: https://saref.etsi.org/saref4wear/Interface

An interface is the mechanism with which a device can receive or transmit data to another device.

is in range of
s4wear:hasInterfacec

Living organism back to ToC or Class ToC

IRI: https://saref.etsi.org/saref4wear/LivingOrganism

A living organism is any entity composed of cells.

Memory storage back to ToC or Class ToC

IRI: https://saref.etsi.org/saref4wear/MemoryStorage

A memory storage is an hardware component intended to store data within the device.

has super-classes
saref:Devicec

Navigating function back to ToC or Class ToC

IRI: https://saref.etsi.org/saref4wear/NavigatingFunction

A function that allows a device to provide navigation information.

has super-classes
saref:Functionc

Near-body wearable back to ToC or Class ToC

IRI: https://saref.etsi.org/saref4wear/NearBodyWearable

A near-body wearable is a wearable located near a physical body.

has super-classes
s4wear:Wearablec and (s4wear:isLocatedNearop some s4wear:Wearerc)
is in domain of
s4wear:isLocatedNearc

Occurrence back to ToC or Class ToC

IRI: https://saref.etsi.org/saref4wear/Occurrence

An occurrence is the fact of something existing or being found in a place.

has super-classes
s4wear:takesPlaceAtop only geosp:Featurec
has sub-classes
s4city:Eventc
is in domain of
s4wear:isDetectedByc

On-body wearable back to ToC or Class ToC

IRI: https://saref.etsi.org/saref4wear/OnBodyWearable

An on-body wearable is a wearable having a direct contact with a physical body.

has super-classes
s4wear:Wearablec and (s4wear:isLocatedOnop some s4wear:Wearerc)
has sub-classes
s4wear:TextileBasedWearablec
is in domain of
s4wear:isLocatedOnc

Policy back to ToC or Class ToC

IRI: https://saref.etsi.org/saref4wear/Policy

A policy is a set of guidelines adopted during the wearable building process and defining how a wearables operates.

is in range of
s4wear:followsPolicyc

Power supply back to ToC or Class ToC

IRI: https://saref.etsi.org/saref4wear/PowerSupply

A power supply is an hardware component intended to plug a device to a power grid.

has super-classes
saref:Devicec
is in range of
s4wear:hasPowerSupplyc

Software back to ToC or Class ToC

IRI: https://saref.etsi.org/saref4wear/Software

A software is a computer program.

has super-classes
saref:FeatureOfInterestc

Textile-based sensor back to ToC or Class ToC

IRI: https://saref.etsi.org/saref4wear/TextileBasedSensor

A textile-based sensor is a sensor directly integrated into a textile artifact.

has super-classes
saref:Sensorc

Textile-based wearable back to ToC or Class ToC

IRI: https://saref.etsi.org/saref4wear/TextileBasedWearable

A textile-based wearable is a wearable directly integrated into a textile artifact.

has super-classes
s4wear:OnBodyWearablec
has sub-classes
s4wear:FabricWearablec

User back to ToC or Class ToC

IRI: https://saref.etsi.org/saref4wear/User

A user is an entity using a wearable.

has super-classes
saref:FeatureOfInterestc
is in domain of
s4wear:interactsWithc

Wearable device back to ToC or Class ToC

IRI: https://saref.etsi.org/saref4wear/Wearable

A wearable device is a device that is intended to be located near, on or in an organism.

Wearable property back to ToC or Class ToC

IRI: https://saref.etsi.org/saref4wear/WearableProperty

Class to group those properties related to wearables.

Wearer back to ToC or Class ToC

IRI: https://saref.etsi.org/saref4wear/Wearer

A wearer is any living organism that is sensed by a wearable.

Wearer property back to ToC or Class ToC

IRI: https://saref.etsi.org/saref4wear/WearerProperty

Class to group those properties related to wearers.

has super-classes
saref:Propertyc
has sub-classes
s4wear:BiometricPropertyc

Object Properties

controls feature back to ToC or Object Property ToC

IRI: https://saref.etsi.org/saref4wear/controlsFeature

A relationship specifying the features of interest that are controlled by a device.

has domain
saref:Devicec
has range
saref:FeatureOfInterestc

feature is controlled by device back to ToC or Object Property ToC

IRI: https://saref.etsi.org/saref4wear/featureIsControlledByDevice

A relationship specifying the devices that control a feature of interest.

has domain
saref:FeatureOfInterestc
has range
saref:Devicec

feature is measured by device back to ToC or Object Property ToC

IRI: https://saref.etsi.org/saref4wear/featureIsMeasuredByDevice

A relationship specifying the devices that measure a feature of interest.

has domain
saref:FeatureOfInterestc
has range
saref:Devicec

follows policy back to ToC or Object Property ToC

IRI: https://saref.etsi.org/saref4wear/followsPolicy

A relationship specifying the policy followed by a wearable device.

has domain
s4wear:Wearablec
has range
s4wear:Policyc

has interface back to ToC or Object Property ToC

IRI: https://saref.etsi.org/saref4wear/hasInterface

A relationship specifying the interface with which a device is equipped.

has domain
saref:Devicec
has range
s4wear:Interfacec

has power supply back to ToC or Object Property ToC

IRI: https://saref.etsi.org/saref4wear/hasPowerSupply

A relationship specifying the type of power supply equipping a device.

has domain
saref:Devicec
has range
s4wear:PowerSupplyc

has sensor back to ToC or Object Property ToC

IRI: https://saref.etsi.org/saref4wear/hasSensor

A relationship specifying a sensor integrated into a device.

has domain
saref:Devicec
has range
saref:Sensorc

installs back to ToC or Object Property ToC

IRI: https://saref.etsi.org/saref4wear/installs

A relationship specifying in which facility a device has been installed.

has domain
s4city:Facilityc
has range
saref:Devicec

interacts with back to ToC or Object Property ToC

IRI: https://saref.etsi.org/saref4wear/interactsWith

A relationship specifying the interaction between a user and a device.

has domain
s4wear:Userc
has range
saref:Devicec

is detected by back to ToC or Object Property ToC

IRI: https://saref.etsi.org/saref4wear/isDetectedBy

Defines the relationship between an occurrence and the device detecting it.

has domain
s4wear:Occurrencec
has range
saref:Devicec

is located back to ToC or Object Property ToC

IRI: https://saref.etsi.org/saref4wear/isLocated

A relationship specifying the location of a wearer with respect to a wearable.

is located in back to ToC or Object Property ToC

IRI: https://saref.etsi.org/saref4wear/isLocatedIn

A relationship specifying the location of a wearer with respect to an in-body wearable.

has super-properties
s4wear:isLocatedop
has domain
s4wear:InBodyWearablec
has range
s4wear:Wearerc

is located near back to ToC or Object Property ToC

IRI: https://saref.etsi.org/saref4wear/isLocatedNear

A relationship specifying the location of a wearer with respect to an near-body wearable.

has super-properties
s4wear:isLocatedop
has domain
s4wear:NearBodyWearablec
has range
s4wear:Wearerc

is located on back to ToC or Object Property ToC

IRI: https://saref.etsi.org/saref4wear/isLocatedOn

A relationship specifying the location of a wearer with respect to an on-body wearable.

has super-properties
s4wear:isLocatedop
has domain
s4wear:OnBodyWearablec
has range
s4wear:Wearerc

is triggered by back to ToC or Object Property ToC

IRI: https://saref.etsi.org/saref4wear/isTriggeredBy

A relationship specifying the function actuating the work of a device.

has domain
saref:ActuatingFunctionc
has range
saref:Devicec
is inverse of
s4wear:triggersop

measures feature back to ToC or Object Property ToC

IRI: https://saref.etsi.org/saref4wear/measuresFeature

A relationship specifying the features of interest that are measured by a device.

has domain
saref:Devicec
has range
saref:FeatureOfInterestc

monitors back to ToC or Object Property ToC

IRI: https://saref.etsi.org/saref4wear/monitors

A relationship specifying the monitoring activity of a device on another device.

has domain
saref:Devicec
has range
saref:Devicec

sends information to back to ToC or Object Property ToC

IRI: https://saref.etsi.org/saref4wear/sendsInformationTo

A relationship specifying the sending information operation between two wearables.

has super-properties
s4syst:connectedToop
has domain
s4wear:Wearablec
has range
s4wear:Wearablec

sends notifications to back to ToC or Object Property ToC

IRI: https://saref.etsi.org/saref4wear/sendsNotificationsTo

A relationship specifying the sending notification operation between two wearables.

has super-properties
s4syst:connectedToop
has domain
s4wear:Wearablec
has range
s4wear:Wearerc

takes place at back to ToC or Object Property ToC

IRI: https://saref.etsi.org/saref4wear/takesPlaceAt

The place where an occurrence takes place.

triggers back to ToC or Object Property ToC

IRI: https://saref.etsi.org/saref4wear/triggers

A relationship specifying the function actuating the work of a device.

has domain
saref:Devicec
has range
saref:ActuatingFunctionc
is inverse of
s4wear:isTriggeredByop

Data Properties

has capacity back to ToC or Data Property ToC

IRI: https://saref.etsi.org/saref4wear/hasCapacity

A relationship defining the capacity of a facility.

has domain
s4city:Facilityc
has range
xsd:long

has command back to ToC or Data Property ToC

IRI: https://saref.etsi.org/saref4wear/hasCommand

A relationship defining a command triggered by an actuating function.

has domain
saref:ActuatingFunctionc
has range
xsd:string

has data transmission rate back to ToC or Data Property ToC

IRI: https://saref.etsi.org/saref4wear/hasDataTransmissionRate

A relationship defining the data transmission rate of a wearable.

has domain
s4wear:Wearablec
has range
xsd:double

has height back to ToC or Data Property ToC

IRI: https://saref.etsi.org/saref4wear/hasHeight

A relationship defining the height dimension of a wearable.

has domain
s4wear:Wearablec
has range
xsd:double

has length back to ToC or Data Property ToC

IRI: https://saref.etsi.org/saref4wear/hasLength

A relationship defining the length dimension of a wearable.

has domain
s4wear:Wearablec
has range
xsd:double

has storage back to ToC or Data Property ToC

IRI: https://saref.etsi.org/saref4wear/hasStorage

A relationship defining the storage capacity of a wearable.

has domain
s4wear:Wearablec
has range
xsd:double

has weight back to ToC or Data Property ToC

IRI: https://saref.etsi.org/saref4wear/hasWeight

A relationship defining the weight of a wearable device.

has domain
s4wear:Wearablec
has range
xsd:double

has width back to ToC or Data Property ToC

IRI: https://saref.etsi.org/saref4wear/hasWidth

A relationship defining the width dimention of a wearable.

has domain
s4wear:Wearablec
has range
xsd:double

means of transport back to ToC or Data Property ToC

IRI: https://saref.etsi.org/saref4wear/meansOfTransport

A relationship stating the means of transport on which the wearable is operating.

has domain
saref:FeatureOfInterestc
has range
xsd:string

wearer age range back to ToC or Data Property ToC

IRI: https://saref.etsi.org/saref4wear/wearerAgeRange

A relationship stating the age range of a wearer.

has domain
s4wear:Wearerc
has range
xsd:string

wearer status back to ToC or Data Property ToC

IRI: https://saref.etsi.org/saref4wear/wearerStatus

A relationship defining the status of a wearer.

has domain
s4wear:Wearerc
has range
xsd:string

Named Individuals

Acoustic emission back to ToC or Named Individuals ToC

IRI: https://saref.etsi.org/saref4wear/AcousticEmission

The acoustic emission of the wearable.

Air quality back to ToC or Named Individuals ToC

IRI: https://saref.etsi.org/saref4wear/AirQuality

The quality of air in the environment.

Battery remaining time back to ToC or Named Individuals ToC

IRI: https://saref.etsi.org/saref4wear/BatteryRemainingTime

The time until the battery of the wearable is discharged.

Crowd size back to ToC or Named Individuals ToC

IRI: https://saref.etsi.org/saref4wear/CrowdSize

The size of a crowd.

Heart rate back to ToC or Named Individuals ToC

IRI: https://saref.etsi.org/saref4wear/HeartRate

The heart rate of the wearer.

Heat emission back to ToC or Named Individuals ToC

IRI: https://saref.etsi.org/saref4wear/HeatEmission

The heat emission of the wearable.

Queue size back to ToC or Named Individuals ToC

IRI: https://saref.etsi.org/saref4wear/QueueSize

The size of a queue.

Radio frequency emission back to ToC or Named Individuals ToC

IRI: https://saref.etsi.org/saref4wear/RadioFrequencyEmission

The radio frequency emission of the wearable.

Sound level back to ToC or Named Individuals ToC

IRI: https://saref.etsi.org/saref4wear/SoundLevel

The level of sound in the environment.

Temperature back to ToC or Named Individuals ToC

IRI: https://saref.etsi.org/saref4wear/Temperature

The temperature of the environment.

Wearer temperature back to ToC or Named Individuals ToC

IRI: https://saref.etsi.org/saref4wear/WearerTemperature

The temperature of the wearer.

This documentation page was generated automatically using SPARQL-Generate, developed by Maxime Lefrançois. The SAREF public portal, the SAREF sources with continuous integration and deployment, the SAREF Pipeline software, and ETSI Technical Specification TS 103 673 v1.1.1 "SAREF Development Framework and Workflow, Streamlining the Development of SAREF and its Extensions", have been developed in the context of the ETSI STF 578, which followed the ETSI STF 556.