{"@context":"https://schema.org","@type":"Class","@id":"https://schema.org/Observation","rdfs:label":"Observation","rdfs:comment":"Instances of the class [[Observation]] are used to specify observations about an entity at a particular time. The principal properties of an [[Observation]] are [[observationAbout]], [[measuredProperty]], [[statType]], [[value] and [[observationDate]]  and [[measuredProperty]]. Some but not all Observations represent a [[QuantitativeValue]]. Quantitative observations can be about a [[StatisticalVariable]], which is an abstract specification about which we can make observations that are grounded at a particular location and time.\n\nObservations can also encode a subset of simple RDF-like statements (its observationAbout, a StatisticalVariable, defining the measuredPoperty; its observationAbout property indicating the entity the statement is about, and [[value]] )\n\nIn the context of a quantitative knowledge graph, typical properties could include [[measuredProperty]], [[observationAbout]], [[observationDate]], [[value]], [[unitCode]], [[unitText]], [[measurementMethod]].","rdfs:subClassOf":[{"@id":"https://schema.org/Intangible"},{"@id":"https://schema.org/QuantitativeValue"}],"schema:properties":["marginOfError","measuredProperty","measurementDenominator","measurementMethod","measurementQualifier","measurementTechnique","observationAbout","observationDate","observationPeriod","variableMeasured"],"schema:subTypes":[]}