<p>SAREF is conceived in a modular way in order to allow the definition of any device from pre-defined building blocks, based on the function(s) that the device performs. Therefore, a <ahref="#saref:Device">saref:Device</a> has at least one function (<ahref="#saref:hasFunction">saref:hasFunction</a> min 1 <ahref="#saref:Function">saref:Function</a>). Moreover, a <ahref="#saref:Device">saref:Device</a> can be used for (<ahref="#saref:isUsedFor">saref:isUsedFor</a> property) the purpose of offering a commodity, such as <ahref="#saref:Water">saref:Water</a> or <ahref="#saref:Gas">saref:Gas</a>. It can also measure a property, such as <ahref="#saref:Temperature">saref:Temperature</a>, <ahref="#saref:Energy">saref:Energy</a> and <ahref="#saref:Smoke">saref:Smoke</a>. Moreover, a device may consist of other devices (<ahref="#saref:consistsOf">saref:consistsOf</a> property).</p>
<figure>
<imgsrc="diagrams/Device.png"alt="Types of devices"/>
<imgsrc="diagrams/DeviceTypes.png"alt="Types of devices"/>
<figcaptionid="Figure_3">Figure 3: Types of devices</figcaption>
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rdfs:comment"""Information about changes compared to version 1.1.1:
- The classes and properties related to how to represent devices in building spaces (such as the saref:BuildingSpace class, saref:BuildingObject class and saref:isLocatedIn property) have been removed from SAREF and incorporated into the SAREF4BLDG extension related to buildings, including the reuse of the W3C¨ WGS84 geo positioning vocabulary.
- The classes and properties related to how to represent devices in building spaces (such as the saref:BuildingSpace class, saref:BuildingObject class and saref:isLocatedIn property) have been removed from SAREF and incorporated into the SAREF4BLDG extension related to buildings, including the reuse of the W3C? WGS84 geo positioning vocabulary.
- The saref:DeviceCategory and saref:FunctionCategory classes have been removed. Instead, the hierarchy of device categories has been implemented directly as subclasses of the saref:Device class.
- The information specific for energy efficiency has been moved to the SAREF4ENER extension. For example, the saref:Profile class has been redefined to accommodate only the properties that are general enough for any type of profile, not only for energy and power. Details on how to specifically model a power profile can be found in the SAREF4ENER extension.
- The subclasses of the saref:Energy class have been removed (i.e., Average Energy, Maximum Energy, Minimum Energy, Total Energy, HVAC Energy, Hot Water Energy and Lighting Energy).
