<http://erlangen-crm.org/current/E52_Time-Span>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	<http://erlangen-crm.org/current/E1_CRM_Entity> .
_:b36660	<http://www.w3.org/2002/07/owl#onProperty>	<http://erlangen-crm.org/current/P83_had_at_least_duration> .
_:b36659	<http://www.w3.org/2002/07/owl#maxCardinality>	"1"^^<http://www.w3.org/2001/XMLSchema#nonNegativeInteger> .
<http://erlangen-crm.org/current/E52_Time-Span>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Class> .
<http://erlangen-crm.org/current/E52_Time-Span>	<http://www.w3.org/2004/02/skos/core#notation>	"E52"^^<http://www.w3.org/2001/XMLSchema#string> .
_:b36660	<http://www.w3.org/2002/07/owl#maxCardinality>	"1"^^<http://www.w3.org/2001/XMLSchema#nonNegativeInteger> .
<http://erlangen-crm.org/current/E52_Time-Span>	<http://www.w3.org/2000/01/rdf-schema#comment>	"Scope note:\nThis class comprises abstract temporal extents, in the sense of Galilean physics, having a beginning, an end and a duration.\n\nTime 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.\n\nSince 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.\n\nAutomatic processing and querying of instances of E52 Time-Span is facilitated if data can be parsed into an E61 Time Primitive.\n\nExamples:\n- 1961\n- from 12-17-1993 to 12-8-1996\n- 14h30 - 16h22 4th July 1945\n- 9.30 am 1.1.1999 to 2.00 pm 1.1.1999\n- duration of the Ming Dynasty\n\nIn First Order Logic:\nE52(x) \u2283 E1(x)"@en .
_:b36658	<http://www.w3.org/2002/07/owl#someValuesFrom>	<http://erlangen-crm.org/current/E2_Temporal_Entity> .
_:b36660	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Restriction> .
_:b36658	<http://www.w3.org/2002/07/owl#onProperty>	<http://erlangen-crm.org/current/P4i_is_time-span_of> .
<http://erlangen-crm.org/current/E52_Time-Span>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	_:b36660 .
<http://erlangen-crm.org/current/E52_Time-Span>	<http://www.w3.org/2000/01/rdf-schema#label>	"E52 Time-Span"@en .
_:b36658	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Restriction> .
_:b36659	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Restriction> .
<http://erlangen-crm.org/current/E52_Time-Span>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	_:b36658 .
<http://erlangen-crm.org/current/E52_Time-Span>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	_:b36659 .
_:b36659	<http://www.w3.org/2002/07/owl#onProperty>	<http://erlangen-crm.org/current/P84_had_at_most_duration> .