Digital Object This class comprises identifiable immaterial items that can be represented as sets of bit sequences, such as data sets, e-texts, images, audio or video items, software, etc., and are documented as single units. Any aggregation of instances of D1 Digital Object into a whole treated as single unit is also regarded as an instance of D1 Digital Object. This means that for instance, the content of a DVD, an XML file on it, and an element of this file, are regarded as distinct instances of D1 Digital Object, mutually related by the P106 is composed of (forms part of) property. A D1 Digital Object does not depend on a specific physical carrier, and it can exist on one or more carriers simultaneously. Geometry Scope note: This class comprises definitions of places by quantitative expressions. An instance of SP5 Geometric Place Expression can be seen as a prescription of how to find the location meant by this expression in the real world (S), which is based on measuring where the quantities referred to in the expression lead to, beginning from the reference points of the respective reference system. Spatial Coordinate Reference System Scope note: This class compromises systems that are used to describe locations in a SP3 Reference Space (S). An instance of SP4 Spatial Coordinate Reference System is composed of two parts: The first is a Coordinate System which is a set of coordinate axes with specified units of measurement and axis directions. The second part is a set of reference features at rest in the Reference Space it describes in the real world that relate the Coordinate System to real world locations (U) and fix it with respect to the reference object of its Reference Space. expressed in terms of Scope note: This property defines the coordinate reference system in terms of which a geometric place expression is formulated. terms express triggers triggered by Encounter This class comprises activities of S4 Observation (substance) where an E39 Actor encounters an instance of E18 Physical Thing of a kind relevant for the mission of the observation or regarded as potentially relevant for some community (identity). This observation produces knowledge about the existence of the respective thing at a particular place in or on surrounding matter. This knowledge may be new to the group of people the actor belongs to. In that case we would talk about a discovery. The observer may recognize or assign an individual identity of the thing encountered or regard only the type as noteworthy in the associated documentation or report. Note that this representation treats S19 as a subClass of only E7 Activity for ease of implementation, as we do not need the full set of relationships available via the complete hierarcy. In the full CRMsci, it is Activity -> Attribute Assignment -> Observation -> Encounter. encountered object was encountered by label A human-readable name for the subject. exactMatch Exact Match, not quite sameAs, good for most uses closeMatch Close Match, good for some uses seeAlso A related resource, that is machine readable and related to the current resource. conforms to Some thing conforms to some standard format The media type of the information object