[{"classID":50,"classLabelLanguage":"en","classLabel":"Time-Span","parentClasses":[1,539],"ancestorClasses":[],"classScopeNoteLanguage":"en","classScopeNote":"This class comprises abstract temporal extents, in the sense of Galilean physics, having a beginning, an end and a duration. Time Span has no other semantic connotations. Time-Spans are used to define the temporal extent of instances of E4 Period, E5 Event and any other phenomena valid for a certain time. An E52 Time-Span may be identified by one or more instances of E49 Time Appellation. Since our knowledge of history is imperfect, instances of E52 Time-Span can best be considered as approximations of the actual Time-Spans of temporal entities. The properties of E52 Time-Span are intended to allow these approximations to be expressed precisely. An extreme case of approximation, might, for example, define an E52 Time-Span having unknown beginning, end and duration. Used as a common E52 Time-Span for two events, it would nevertheless define them as being simultaneous, even if nothing else was known. Automatic processing and querying of instances of E52 Time-Span is facilitated if data can be parsed into an E61 Time Primitive.","entityBasicType":10,"entityBasicTypeLabel":"Region","classIdentifierInNamespace":"E52","classURI":"http://www.cidoc-crm.org/cidoc-crm/E52","namespaceURI":"http://www.cidoc-crm.org/cidoc-crm/","namespaceID":188,"namespacePrefix":"crm","namespaceLabelLanguage":"en","namespaceLabel":"CIDOC CRM version 7.1.3","profileAssociationType":"selected","profileID":488,"profileLabelLanguage":"en","profileLabel":"Creation Time-Span ongoing"},{"classID":335,"classLabelLanguage":"en","classLabel":"Time Primitive","parentClasses":[40,337],"ancestorClasses":[1,27,64,65,66,70,82],"classScopeNoteLanguage":"en","classScopeNote":"This class comprises instances of E59 Primitive Value for time that should be implemented with appropriate validation, precision and references to temporal coordinate systems to express time in some context relevant to cultural and scientific documentation.Instantiating different instances of E61 Time Primitive relative to the same instance of E52 Time-Span allows for the expression of multiple opinions/approximations of the same phenomenon. When representing different opinions/approximations of the E52 Time-Span of some E2 Temporal Entity, multiple instances of E61 Time Primitive should be instantiated relative to one E52 Time-Span. Only one E52 Time-Span should be instantiated since there is only one real phenomenal time extent of any given temporal entity.The instances of E61 Time Primitive are not considered as elements of the universe of discourse that the CIDOC CRM aims at defining and analysing. Rather, they play the role of a symbolic interface between the scope of this model and the world of mathematical and computational manipulations and the symbolic objects they define and handle.Therefore, they must not be represented in an implementation by a universal identifier associated with a content model of different identity. In a concrete application, it is recommended that the primitive value system from a chosen implementation platform and/or data definition language be used to substitute for this class.","entityBasicType":8,"entityBasicTypeLabel":"Persistent Item","classIdentifierInNamespace":"E61","classURI":"http://www.cidoc-crm.org/cidoc-crm/E61","namespaceURI":"http://www.cidoc-crm.org/cidoc-crm/","namespaceID":188,"namespacePrefix":"crm","namespaceLabelLanguage":"en","namespaceLabel":"CIDOC CRM version 7.1.3","profileAssociationType":"inferred","profileID":488,"profileLabelLanguage":"en","profileLabel":"Creation Time-Span ongoing"}]