[Crm-sig] Issue 230 Co-reference

[Maximilian Schich]

Whoever collects co-references: The number of co-reference links 
explodes n*(n-1) with the number of references to the reference object. 
Imagine co-reference links between all books citing the bible. This is 
likely to result in a high error-rate, especially in manual curation.

Workaround: Use simple references to an "unknown/potential reference 
object" and put a probability on those links => scales with n.

Max Schich

On 2014-03-26 14:26 , martin wrote:
> Dear All,
>
> Here my homework:
>
>
>       E91 Co-Reference Assignment
>
> Subclass of:E13 Attribute Assignment
>
> Scope note:This class comprises actions of making the assertion 
> whether two or more particular instances of E89 Propositional Object 
> refer to the same instance of E1 CRM Entity. The assertion is based on 
> the assumption that this was an implicit fact being made explicit by 
> this assignment. Use of this class allows for the full description of 
> the context of this assignment. (MD will write an extension about the 
> levels of belief)
>
> A co-reference assertion may admit a certain degree or strength of 
> belief, such as "possibly", "most likely" etc. This can be modelled 
> using the property /P2 has type/ with a suitable terminology. However, 
> this degree of belief will be common to all statement asserted by one 
> instance of E91 Co-Reference Assignment. Otherwise, the assertion must 
> be broken down into a suitable number of instances with different 
> degrees of belief.
>
> If there exists a document describing particular evidence, this can be 
> referred to by using /P used specific object/. There may nothing more 
> be known about the instance of E1 CRM Entity to which the described 
> statements are assumed to refer to than the facts expressed by these 
> very statements.
>
> Frequently, scholars may like to contradict to a co-reference 
> statement or point to frequent confusions. This can be modelled using 
> the property /P154 <#_P154_assigned_non>//assigned non co-reference to./
>
> The property /P155 <#_P155_has_co-reference>//has co-reference 
> target/allows for associating an ???
>
> //
>
>
> In the end, I got confused: The range of P155 can be interpreted as a 
> URI used within the same knowledge base as the instance of E91. Then, 
> it would correspond to a co-reference between some text element and 
> the knowledge base in which we implement the CRM, the "local truth".
> In that case, also one instance of P153 would make sense, even two 
> instances of P155 only.
> In case we talk about Linked Open Data, the issue becomes more 
> obscure. We could regard the co-reference to be between some text 
> element and the document the URI resolves into.
> If however someone uses this very URI in another context, the question 
> of co-reference is again there.
>
> It appears as if we need a construct to refer to the use of a URI 
> within a knowledge base or RDF document as an instance of 
> Propositional Object. If we follow this line, then the interpretation 
> of P155 pointing to a "self co-reference" would be consistent, and any 
> other
> meaning of referring to a URI would need a contextualization of the 
> URI to be discussed.
>
> Opinions?
>
> Best,
>
> Martin
> -- 
>
> --------------------------------------------------------------
>   Dr. Martin Doerr              |  Vox:+30(2810)391625        |
>   Research Director             |  Fax:+30(2810)391638        |
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