[topicmapmail] How to best model relations with mode (assertive, modal, intention, negation) with topic maps?

[Alexander Sigel]

Dear topic mappers,

I'd like to model assertions which are only true in the interpretation
of a certain mode.
(cf. [1, p. 95]: (*1*) assertive (is [default]), (*2*) modal (may be
[possible world]), (*3*) intention (is intended or claimed to be), (*4*)
negation (is not)).

Examples:
(1) fish staircases IS-BENEFICIAL-FOR (*1*) - protection of living
marine resources
(2) raising the vat IS-INSTRUMENTAL-FOR (*2*) - cut in state deficit
(3) killing of cats for experiments IS (*3*) - murder 
(4) Frankfurt Stock Exchange IS-UNITING-WITH (*4*) - London Stock
Exchange

(Note: Modes are only statement types (as in linguistic modality), modal
logics is not implied here)

My question is:
Which of the following modelling possibilities seems to be most
appropriate, topic mappish and best practice?

1. extend each association type with four subtyped relationship types,
one for each mode
2. reifiy the association and connect with a binary association
(statement - mode: has mode/is mode of) to the mode type
3. extend the binary association types by the mode role type to ternary
ones
4. use scope(s) to represent context/viewpoints

For the moment, I lean towards relationship subtypes or reification, but
have not taken any decision yet.

Do you have other suggestions? Some feedback is appreciated!
  	
[1]
Schmitz-Esser, W. & Sigel, A. (2006): Introducing Terminology-based
Ontologies. Papers and Materials presented by the authors at the
workshop "Introducing Terminology-based Ontologies"
(Poli/Schmitz-Esser/Sigel) at the 9th International Conference of the
International Society for Knowledge Organization (ISKO), Vienna,
Austria, July 6th, 2006. 130 pages. Published electronically on E-LIS
(E-prints in Library and Information Science,
http://eprints.rclis.org/archive/00006612/), 2006-07-14

Best regards
alex
---
Alexander Sigel, M.A., Researcher in Semantic Knowledge Networking
Univ. of Cologne, Dept. of Information Systems & Information Management
http://www.wim.uni-koeln.de/19.0.html
sigel at wim.uni-koeln.de, +49 221 470-5322