]> http://ontonym.org/0.7/sensor http://ontonym.org/0.7/sensor 0.8 Copyright 2008-2009. This work is jointly owned by Graeme Stevenson, Stephen Knox, and University College Dublin. This work is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported Licence. Graeme Stevenson and Stephen Knox The Ontonym Sensor ontology The Ontonym sensor ontology is concerned with the description of sensors and the data they generate. The ontology defines a set of general properties for categorising the quality of the data produced by sensors. Non-temporal values in the ontology are represented using the Measurement Units Ontology (MUO). Documentation can be found at http://forge.morfeo-project.org/wiki_en/index.php/Units_of_measurement_ontology. To create a sensor, a new ontology extending from this one should be created. The newly created ontology should define sensor specific quality measures, and coverage and value representation formats. The temporal dimensions of observed facts are specified using the Ontonym temporal model. See http://ontonym.org for details. coverage A description of the possible set of observations a sensor can provide. The representation of coverage is sensor specific. For example, the converage of a location sensor could be a set of rooms, while the coverage of a temperature sensor may be a particular room combined with a range of temperatures. frequency Frequency is a measure of the duration between sensor readings. observed Relates a sensor to the observastions it has made. timestamp The instant when an observation was made by a sensor observed by The sensor that made the observation precision component The precision component of a PrecisionAccuracyPair rateOfChange the expected length of time for the observed value to change. For example, the location of a walking person will be expected to change in milliseconds, while the expected change to the location of a sleeping person may be measured in hours. running a sensor which is currently running on this device running on the device on which this sensor is running temporal dimension The instant or interval over which the value of an observation is considered "true". This enables the modelling of historic and planned data. accuracy The accuracy component of a PrecisionAccuracyPair. An accuracy value describes the probability of a sensor's observation achieving a particular precision and is measured as an integer between 0 and 1. precision-accuracy pair A pair of precision and accuracy values that characterise the degree of error in a sensor's readings. precision value A value range used in conjunction with an accuracy value to characterise the degree of error in a sensor's readings. sensor A sensor is any piece of hardware or software that measures or observes a phenomenan (either physical or vitual) and encodes a represenation of this observation.