Affects: SAREF

Situation: It is clear from some definitions of properties what the subject and/or the object is. If some SAREF user uses them differently, it may lead to interoperability issues.

• saref:accomplishes: A relationship between a certain entity (e.g., a device) and the task it accomplishes From this definition, it is unambiguous that the object of a saref:accomplishes relationship is always a task.
• saref:accomplishes - A relationship between a certain entity (e.g., a device) and the task it accomplishes
  • domain is saref:Command and range is saref:State
• saref:actsUpon - A relationship between a command and a state
  • domain saref:Command, range saref:State
• saref:controlsProperty - A relationship specifying the Property that can be controlled by a certain Device
  • domain saref:Device, range saref:Property
• saref:hasCommand - A relationship between an entity (such as a function) and a command
  • domain saref:Function and range saref:Command
• saref:hasFunction - A relationship identifying the type of function of a device
  • domain saref:Device and range saref:Function
• saref:hasMeterReading - A relationship between a metering function and the measurement of the reading
  • domain saref:MeteringFunction and range saref:Measurement.
• saref:hasMeterReadingType - A relationship identifying the reading type of a measurement (e.g., Water, Gas, Pressure , Energy , Power, etc.)
  • domain saref:Measurement and range saref:Property
• saref:hasPrice - A relationships indentifying the price associated to an entity
  • range saref:Price
• saref:hasProfile - A relationship associating a profile to a certain entity (e.g., a device)
  • domain saref:Device and range saref:Profile
• saref:hasSensingRange - A relationship between a sensing function and a measurement identifying the range of a sensor detection
  • domain saref:SensingFunction and range saref:Measurement
• saref:hasSensorType - A relationship identifying the sensing type of a sensor detection (i.e., Temperature, Occupancy, Humidity, Motion , Smoke, Pressure, etc.)
  • domain saref:SensingFunction and range Property
• saref:hasState - A relationship identifying the type of state of a device
  • domain saref:Device and range saref:State
• saref:hasThresholdMeasurement - A relationship associated with an event function to notify that a certain threshold measurement has been exceeded
  • domain saref:EventFunction and range saref:Measurement
• saref:hasTime - A relationship to associate time information to an entity
  • range saref:Time
• saref:isAccomplishedBy - A relationship identifying the task accomplished by a certain entity (e.g., a device)
  • domain saref:Task
• saref:isCommandOf - A relationship between a command and a function.
  • domain saref:Command and range saref:Function
• saref:isControlledByDevice - A relationship specifying the devices that can control a certain property
  • domain saref:Property and range saref:Device
• saref:isMeasuredByDevice - A relationship specifying the devices that can measure a certain property
  • domain saref:Property and range saref:Device
• saref:isMeasuredIn - A relationship identifying the unit of measure used for a certain entity.
  • domain saref:Measurement and range saref:UnitOfMeasure
• saref:isOfferedBy - A relationship between a service and a device that offers the service
  • domain saref:Service and range saref:Device
• saref:makesMeasurement - A relation between a device and the measurements it makes. Such measurement will link together the value of the measurement, its unit of measure and the property to which it relates.
  • domain saref:Device and range saref:Measurement
• saref:measuresProperty - A relationship specifying the Property that can be measured by a certain Device
  • domain saref:Device and range saref:Property
• saref:offers - A relationship between a device and a service
  • domain saref Device and range saref:Service
• saref:relatesToMeasurement - A relationship between a property and the measurements it relates to
  • domain saref:Property and range saref:Measurement
• saref:relatesToProperty - A relationship between a measurement and the property it relates to
  • domain saref:Measurement and range saref:Property
• saref:represents - A relationship between a service and a function.
  • domain saref:Service and range saref:Function

Proposal: To add ObjectPropertyDomain and ObjectPropertyRange axioms wherever the definition of a property unambiguously identifies the domain or the range of a property.

Status: agreed during SmartM2M-RG Meeting about 2 NWIs SAREFv3 and SAREF Com Framework V2 2019-04-08