[Crm-sig] Home work, new scope note of E92

Martin Doerr martin at ics.forth.gr
Mon Apr 8 13:59:01 EEST 2019


Dear All,
Here my attempt to reduce the confusion about STVs:-[


Comments welcome!

Martin


      OLD:


      E92 Spacetime Volume

  Subclassof: E1 <#_E1_CRM_Entity> CRM Entity

Superclass of: E4 <#_E4_Period>Period

E18 <#_E18_Physical_Thing>Physical Thing

E93 <#_E93_Presence>Presence

  Scopenote:This class comprises 4 dimensional point sets (volumes) in 
physical spacetime regardless its true geometric form. They may derive 
their identity from being the extent of a material phenomenon or from 
being the interpretation of an expression defining an extent in 
spacetime. Intersections of instances of E92 Spacetime Volume, Place and 
Timespan are also regarded as instances of E92 Spacetime Volume.An 
instance of E92 Spacetime Volume is either contiguous or composed of a 
finite number of contiguous subsets. Its boundaries may be fuzzy due to 
the properties of the phenomena it derives from or due to the limited 
precision up to which defining expression can beidentified with a real 
extent in spacetime. The duration of existence of an instance of a 
spacetime volume is trivially its projection on time.

Examples:

·the spacetime Volume of the Event of Caesar’s murder

·the spacetime Volume where and when the carbon 14 dating of the 
"Schoeninger Speer II" in 1996 took place

·the spatio-temporal trajectory of the H.M.S. Victory from its building 
to its actual location

·the spacetime volume defined by a polygon approximating the Danube 
river flood in Austria between 6^th and 9^th of August 2002

In First Order Logic:

E92(x) ⊃E1(x)

Properties:

P10 <#_P10_falls_within_(contains)>falls within (contains): E92 
<#_E91_Co-Reference_Assignment>Spacetime Volume

P132 <#_P132_overlaps_with>spatiotemporally overlaps with: E92 
<#_E91_Co-Reference_Assignment>Spacetime Volume

P133 <#_P133_is_separated_from>spatiotemporally separated from: E92 
<#_E91_Co-Reference_Assignment>Spacetime Volume

P160 <#_P160_(Px5)_> has temporal projection: E52 <#_E52_Time-Span> 
Time-Span

P161 <#_P161_(Px6)_> has spatial projection: E53 <#_E53_Place> Place

**

*NEW*


      E92 Spacetime Volume

Subclassof: E1 <#_E1_CRM_Entity> CRM Entity

Superclass of: E4 <#_E4_Period>Period

E18 <#_E18_Physical_Thing>Physical Thing

E93 <#_E93_Presence>Presence

Scopenote:This class comprises sets of 4 dimensional points forming 
contiguous volumes in physical spacetime, as understood in physics. They 
may derive their identity from being the extent of a material phenomenon 
or from being the application of a geometric expression defining an 
extent in spacetime. Intersections of instances of E92 Spacetime Volume, 
Place and Timespan are also regarded as instances of E92 Spacetime 
Volume.An instance of E92 Spacetime Volume is either contiguous or 
composed of a finite number of contiguous subsets. Its boundaries may be 
fuzzy due to the properties of the phenomena it derives from or due to 
the limited precision up to which defining expression can beidentified 
with a real extent in spacetime. The duration of existence of an 
instance of a spacetime volume is trivially its projection on time.

Volumes in spacetime are not easy to be imagined and most users of the 
CRM may not be concerned with them, using only indirectly E92 Spacetime 
Volume via its phenomenal subclasses, such as E4 Period. E92 Spacetime 
Volume should not directly be instantiated to describe such items having 
a phenomenal identity. Nevertheless, the class forms part of the logical 
foundations of the CRM and is basic for the logic of reconstructions of 
stages of buildings, things contained in mobile things and others. It is 
a fundamental construct to describe and reason about topological and 
chronological relationships and forms the primary logical connection of 
the CRM to the standards of the georeferencing communities[1]. E92 
Spacetime Volume may directly be instantiated to describe approximations 
of the confinement of phenomenal items using the property/P169 defines 
spacetime volume (spacetime volume is defined by),/typically by defining 
extents in space being constant for some time-span. Such approximations 
must not be confused with the actual extent and identity of the 
respective items. In the definition of spacetime volumes for confining 
things happening on Earth, the altitudinal extent is normally omitted.

The best intuition about a point in spacetime is like the “when and 
where” of a microscopic event. It can be referred to by combinations of 
space and time coordinates, such as (37°58'17.14"N, 23°43'35.72"E, 
156.5m a.s.l., 26/9/1687 12:00), but seen under different reference 
systems of space and time the values to refer to the /same point/ will 
differ. The point itself nor a volume of such points are relative to any 
reference system. A good intuition about a volume in spacetime is that 
of a temporary extent in space, possibly moving and changing, such as 
the inner of a soap bubble or of an airplane, or the water-filled volume 
of a technical lake over one year.

Examples:

·the spacetime volume defined by a polygon approximating the Danube 
river flood in Austria between 6^th and 9^th of August 2002

·the area ruled and controlled by Qin Shi Huan from 7 May 247 BC to 10 
September 210 BC (E4)

·the spacetime volume when and where Caesar’s murder took place from the 
first stabbing to burning his corpse (E7,E69)

·the spacetime volume when and where the carbon 14 dating of the 
"Schoeninger Speer II" in 1996 took place (E16)

·the spatio-temporal trajectory of the H.M.S. Victory from its building 
to its actual location (E18)

In First Order Logic:

E92(x) ⊃E1(x)

Properties:

P10 <#_P10_falls_within_(contains)>falls within (contains): E92 
<#_E91_Co-Reference_Assignment>Spacetime Volume

P132 <#_P132_overlaps_with>spatiotemporally overlaps with: E92 
<#_E91_Co-Reference_Assignment>Spacetime Volume

P133 <#_P133_is_separated_from>spatiotemporally separated from: E92 
<#_E91_Co-Reference_Assignment>Spacetime Volume

P160 <#_P160_(Px5)_> has temporal projection: E52 <#_E52_Time-Span> 
Time-Span

P161 <#_P161_(Px6)_> has spatial projection: E53 <#_E53_Place> Place


------------------------------------------------------------------------

[1] <#_ftnref1>Hiebel, OGC…


M

-- 
------------------------------------
  Dr. Martin Doerr
               
  Honorary Head of the
  Center for Cultural Informatics
  
  Information Systems Laboratory
  Institute of Computer Science
  Foundation for Research and Technology - Hellas (FORTH)
                   
  N.Plastira 100, Vassilika Vouton,
  GR70013 Heraklion,Crete,Greece
  
  Vox:+30(2810)391625
  Email: martin at ics.forth.gr
  Web-site: http://www.ics.forth.gr/isl

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