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contents and meanings of value exchanges. The contributions of the chapter are the-
oretical as well as practical. The main theoretical contribution is an analysis of the
notion of value exchange using Hohfeld's classification of rights. Value exchanges
are not only about transferring ownerships but can also include the transfer and cre-
ation of various other rights such as claims to carry out actions and powers to create
new social relationships. Furthermore, value exchanges are typically associated with
certain kinds of actions not related to rights, in particular the physical transportation
of goods and the provision of evidence documents used to identify the rights holder.
The main practical contributions of the chapter are notations and guidelines, based
on the theoretical analysis, for designing rich value models that are able to provide
detailed and precise representations of the values and relationships in a business
case. These representations will help to bridge the gap between informal descrip-
tions of business cases and the specification of the business processes needed to
realize them. The rich value models will still be on a declarative level and abstract
from process issues like control flow and message formats, but they will be more
detailed than value models only addressing ownership transfers. This added detail
will be a basis for identifying required business processes and their outcomes though
not for designing their procedural form.
A topic for future work is to investigate how the rights created in value exchanges
will be affected by the type of resource being exchanged. In particular, the exchange
of services needs to be analyzed, as services may be viewed as claims themselves
[ 3] . A related issue is how to identify services based on a value model as discussed
in [ 17] . The analysis and proposed guidelines can also be used as building blocks in
a more comprehensive methodology for designing value models.
References
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CT
 
 
 
 
 
 
 
 
 
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