I agree.
Detail: from a maths point of view, partial ordering may be allowed for:
I.e.: not all value pairs can be compared with respect to the order
relation. This happens in spaces with more than one dimension, but does
not affect transitivity. Any math freak here to confirm?;-)
Martin
On 6/11/2019 12:43 PM, Robert Sanderson wrote:
Homework assigned to me to add a notion of concept schemes / context
to the scope note. Agreement at Paris SIG that this could go into
CRMsci and thus “Oxx is conceptually greater than”
Proposed modification to the scope note:
This property allows an instance of E55 Type from a particular concept
scheme or vocabulary to be declared as having an order relative to
other instances of E55 Type in the same or other concept schemes,
without necessarily having a specific value associated with either
instance. This allows, for example, for an E55 Type instance
representing the concept of "good" in a conservation report vocabulary
to be greater than the E55 Type instance representing the concept of
"average" in the same vocabulary. This property is transitive, and
thus if "average" is greater than "poor", then "good" is also greater
than "poor". In the domain of statistics, types that participate in
this kind of relationship are called "Ordinal Variables"; as opposed
to those without order which are called "Nominal Variables". This
property allows for queries that select based on the relative position
of participating E55 Types.
Let me know if that does not fulfil the HW assignment ☺
Rob
*From: *Crm-sig <crm-sig-boun...@ics.forth.gr> on behalf of Stephen
Stead <ste...@paveprime.com>
*Organization: *Paveprime Ltd
*Reply-To: *"ste...@paveprime.com" <ste...@paveprime.com>
*Date: *Thursday, January 3, 2019 at 6:49 AM
*To: *'crm-sig' <Crm-sig@ics.forth.gr>
*Subject: *[Crm-sig] **NEW ISSUE** Ordinal Property for E55 Type
During the discussions at the CRM-SIG meeting during November 2018 in
Berlin the problem of dealing with instances E55 Type that have
ordinal relationships with other instances of E55 Type came up. There
were a number of use cases explored including:-
* Condition report status values like Excellent, Good, Average,
Poor, Critical where being able to query for all items that were
below “Average” or “Good” and above would be useful.
* Map scales expressed as types
* Fire Hazard Ratings
This lead Robert and I to suggest that a new property be created that
allowed this kind of ordinal relationship to be expressed. The
quantification allows for parallel hierarchies, e.g. if someone has a
type that is “slightly better than average but not quite good”, then
they could align that with an existing hierarchy of Good > Average by
saying that it is greater than “Average” and that “Good” is greater
than both it and Average.
Pxx is conceptually greater than (is conceptually less than)
Domain: E55 Type
Range: E55 Type
Quantification: many to many (0,n:0,n)
This property allows instances of E55 Type to be declared as having an
order relative to other instances of E55 Type, without necessarily
having a specific value associated with either instance. This allows,
for example, for an E55 Type instance representing the concept of
"good" to be greater than the E55 Type instance representing the
concept of "average". This property is transitive, and thus if
"average" is greater than "poor", then "good" is also greater than
"poor". In the domain of statistics, types that participate in this
kind of relationship are called "Ordinal Variables"; as opposed to
those without order which are called "Nominal Variables". This
property allows for queries that select based on the relative position
of participating E55 Types.
Examples:
* Good (E55)/is conceptually greater than/ Average (E55)
* Map Scale 1:10000 (E55) /is conceptually greater than/ Map Scale
1:20000 (E55)
* Fire Hazard Rating 4 (E55)/is conceptually greater than/ Fire
Hazard Rating 3 (E55)
Comments Welcome
SdS & Robert S
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--
------------------------------------
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)
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GR70013 Heraklion,Crete,Greece
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Email: mar...@ics.forth.gr
Web-site: http://www.ics.forth.gr/isl
