This ontology extends the SAREF ontology for the Agricultural domain. This work has been developed in the context of the STF 534 (https://portal.etsi.org/STF/STFs/STFHomePages/STF534.aspx), which was established with the goal to create three SAREF extensions, one of them for the Agricultural domain.

# SAREF extension for Agriculture

s4agri
https://w3id.org/def/saref4agri#
0.3
The WGS84 altitude of a SpatialThing (decimal meters above the local reference ellipsoid).
altitude
The WGS84 latitude of a SpatialThing (decimal degrees).
latitude
The WGS84 longitude of a SpatialThing (decimal degrees).
longitude
A spatial representation for a given feature.
has geometry
Exists if the subject SpatialObject spatially contains the object SpatialObject. DE-9IM: T*****FF*
contains
Exists if the subject SpatialObject is spatially within the object SpatialObject. DE-9IM: T*F**F***
within
Relation between a platform and the systems it hosts.
host
Relation between a system and its hosting platform.
is hosted by
Relation between a deployment and the platform(s) involved in the deployment.
deployed on platform
Relation between a deployment and the system deployed.
deployed system
has deployment
has subsystem
Relation between a platform and the deployment(s) that takes place in the platform.
in deployment
Relation to indicate the temporal duration or period of a deployment.
has deployment period
Relation to indicate the geographical componet of a deployment.
is deployed at space
A relationship between a certain entity (e.g., a device) and the task it accomplishes
accomplishes
A relationship between a command and a state
acts upon
controls property
A relationship between an entity (such as a function) and a command
has command
Relation between a measurement and the feature of interest being measured.
has feature of interest
A relationship identifying the type of function of a device
has function
Relation between a feature of interest and its properties.
has property
has state
A relationship indentifying the task accomplished by a certain entity (e.g., a device)
is accomplished by
A relationship between a command and a function.
is command of
is controlled by device
Relation betwwen a feature of interest and the measurments that are about it.
is feature of interest of
is measured by device
is measured in
Relation between a property and a feature of interest in which such property appears.
is property of
makes measurement
Relation between a measurement and the device that made it.
measurement made by
measures property
relates to measurement
relates to property
A relationship providing a description of an entity (e.g., device)
has description
A relationship identifying the manufacturer of an entity (e.g., device)
has manufacturer
A relationship identifying the model of an entity (e.g., device)
has model
has name
has timestamp
has value
This class represents the top-level feature type. This class is equivalent to GFI_Feature defined in ISO 19156:2011, and it is superclass of all feature types.
Feature
The class represents the top-level geometry type. This class is equivalent to the UML class GM_Object defined in ISO 19107, and it is superclass of all geometry types.
Geometry
The class spatial-object represents everything that can have a spatial representation. It is superclass of feature and geometry.
SpatialObject
Uniquely identified by lat/long/alt. i.e.

spaciallyIntersects(P1, P2) :- lat(P1, LAT), long(P1, LONG), alt(P1, ALT), lat(P2, LAT), long(P2, LONG), alt(P2, ALT).

sameThing(P1, P2) :- type(P1, Point), type(P2, Point), spaciallyIntersects(P1, P2).
A point, typically described using a coordinate system relative to Earth, such as WGS84.
Point
point
A temporal entity with zero extent or duration
Instant
A temporal entity with an extent or duration
Time interval
A temporal interval or instant.
Temporal entity
A Platform is an entity that hosts other entities, particularly Sensors, Actuators, Samplers, and other Platforms (definition taken from http://www.w3.org/ns/sosa/Platform)
Platform
Deployment
System is a unit of abstraction for pieces of infrastructure that implement Procedures. A System may have components, its subsystems, which are other Systems. (Definition taken from http://www.w3.org/ns/ssn/System)
System
Deployment
The scenario, including temporal and spatial information, in which the systems and devices are installed.
A sensor that measures the rain fall.
Pluviometer
A sensor that measures the soil moisture.
Soil tensiometer
An actuator to irrigate an space.
Watering gun
A sensor o system that measure weather conditions.
Weather station
Actuator
1
1
A directive that a device must support to perform a certain function. A command may act upon a state, but does not necessarily act upon a state. For example, the ON command acts upon the ON/OFF state, but the GET command does not act upon any state, it simply gives a directive to retrieve a certain value. We propose here a list of commands that are relevant for the purpose of SAREF, but this list can be extended.
Command
Device
Feature of interest
1
The functionality necessary to accomplish the task for which a Device is designed. A device can be designed to perform more than one function. Functions can be structured in categories (subclasses) that reflect different points of view, for example, considering the specific application area for which a function can be used (e.g., light, temperature, motion, heat, power, etc.), or the capability that a function can support (e.g., receive, reply, notify, etc.), and so forth.
Function
A saref:Property related to some measurements that are characterized by a certain value that is measured in a humidity unit
Humidity
1
1
1
1
Represents the measured value made over a property. It is also linked to the unit of measure in which the value is expressed and the timestamp of the measurement.
Measurement
An aspect of an entity that can be observable by a sensor.
Anything that can be sensed, measured or controlled in households, common public buildings or offices. We propose here a list of properties that are relevant for the purpose of SAREF, but this list can be extended.
Property
Property
Sensor
The state in which a device can be found, e.g, ON/OFF/STANDBY, or ONLINE/OFFLINE. We propose here a list of states that are relevant for the purpose of SAREF, but this list can be extended.
State
1
The goal for which a device is designed (from a user perspective). For example, a washing machine is designed for the task of washing. We propose here a list of tasks that are relevant for the purpose of SAREF, but this list can be extended.
Task
A saref:Property related to some measurements that are characterized by a certain value that is measured in a temperature unit (degree_Celsius, degree_Fahrenheit, or degree_kelvin)
Temperature
A saref:Property that allows to specify the time concept in terms of instants or intervals according to the imported W3C Time ontology.
Time
The unit of measure is a standard for measurement of a quantity, such as a Property. For example, Power is a property and Watt is a unit of power that represents a definite predetermined power: when we say 10 Watt, we actually mean 10 times the definite predetermined power called "watt". Our definition is based on the definition of unit of measure in the Ontology of units of Measure (OM). We propose here a list of some units of measure that are relevant for the purpose of the Smart Appliances ontology, but this list can be extended.
The unit of measure is a standard for measurement of a quantity, such as a Property. For example, Power is a property and Watt is a unit of power that represents a definite predetermined power: when we say 10 Watt, we actually mean 10 times the definite predetermined power called "watt". Our definition is based on the definition of unit of measure in the Ontology of units of Measure (OM). We propose here a list of some units of measure that are relevant for the purpose of SAREF, but this list can be extended, also using some other ontologies rather than the Ontology of units of Measure (OM).
Unit of measure
Unit of measure
decibel-milliwatts
degree Celsius
millibar
millimetre
millivolt
Air temperature
Ambient huidity
Irrigation water
Plant growth stage
Precipitation
Soil moisture
Soil temperature
The relation between something and the point, or other geometrical thing in space, where it is. For example, the realtionship between a radio tower and a Point with a given lat and long. Or a relationship between a park and its outline as a closed arc of points, or a road and its location as a arc (a sequence of points). Clearly in practice there will be limit to the accuracy of any such statement, but one would expect an accuracy appropriate for the size of the object and uses such as mapping .
location