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Gautier Dallons, Patrick Heymans, Isabelle Pollet
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The goal-oriented paradigm is widely popular in Requirements
Engineering. However, the central notion of goal remains one of the
most controversial in the field. A possible cause might be that research
has devoted too little attention to studying the ontological foundations of
goal-oriented languages. In this paper, we have studied the case of GRL,
the goal-oriented requirements language being standardized by the ITU.
Our analysis followed the template-based approach proposed by Opdahl
and Henderson-Sellers. After defining a metamodel for GRL, we have
applied the template to each of its constructs to extract and formalize
detailed syntactic and semantic information. The semantic part of the
template focuses on establishing a mapping between a construct and its
meaning, ...  Schrijf als eerste een reactie
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S.J.B.A. Hoppenbrouwers, H.A. Proper, Th.P. van der Weide
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We present an initial framework resulting from our ongoing
research concerning modeling strategies. Our approach is rooted in a subjectivist,
communication-based view on modeling. Under this approach,
models are viewed as the result of modeling dialogues, which are a specialized
sub-type of the diverse conversations that constitute a system
development conversation at large. By focussing on the process of modeling
instead of properties of models or modeling languages, we expect,
eventually, to be able to better understand and deal with some currently
problematic aspects of modeling, in particular model validation
in context. We sketch plans for an environment for studying modeling
conversations and strategies. ... Schrijf als eerste een reactie |
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João Araújo, Ana Moreira
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UML is a standard modelling language that is able to specify a wide
range of object-oriented concepts. However, the diagrams it offers are many
times accused of lack of rigour to specify precisely some critical requirements
and therefore it is often needed to complement the semantics of the UML
diagrams using OCL or any other formal language. In the case of activity
diagrams (used here to describe use cases), OCL is not the most appropriate
formal language, as it does not represent temporal aspects directly. Our aim is
to complement the well-accepted simplicity of activity diagrams with a
temporal logic specification to give a more precise semantics to the final model.
This specification can be further used to validate requirements against the
stakeholders using animation techniques. Schrijf als eerste een reactie |
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Yun Lin, Darijus Strasunskas
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Process templates are stored as valuable resources and then are
retrieved and reused in other projects. In order to find a desired template, the
semantics of various process templates should be machine-readable and
interoperable. However, the heterogeneity of both model representations and
modeling languages makes it difficult to reuse the templates. Here we adopt one
of the emerging semantic web techniques – the semantic annotation of process
templates in order to enhance the interoperability for better reuse of process
templates. Our semantic annotation consists of three basic parts: model profile,
model content and meta model annotation. A general process ontology and
domain ontologies are referenced as the annotation information. ... Schrijf als eerste een reactie |
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Danilo Ardagna, Marco Comerio, Flavio De Paoli, Simone Grega
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Usually, the process of development of services available as
web applications considers only functional requirements. Since, an evergrowing number of users take advantage of different kinds of communication channels and devices, this process must be revised by considering
new aspects: quality of service (QoS), user profiles and technical characteristics of channels. In previous works, we proposed a methodology that
provides a rational to formalize the redesign process of existing services
to support multi-channel access. This paper extends our approach and
highlights how the QoS dimensions can be considered quantitatively in
the different phases of the methodology. Moreover, an hybrid approach
that allows the QoS evaluation, during the development of a service, is
proposed. Schrijf als eerste een reactie |
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Jan Recker
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Information Systems (IS) research has so far been primarily concerned
with the development of new modeling languages, techniques, and
methods. Also, evaluation approaches have been developed in order to assess
the appropriateness of a modeling approach in a given context. Both modeling
and evaluation approaches, however, lack epistemological rigor, leading to
problems regarding the applicability of a certain modeling language in a given
context on the one hand, and regarding the feasibility of certain evaluation approaches
towards certain modeling questions on the other hand. We therefore
argue for a philosophical-paradigmatic discussion of evaluation methods for
conceptual modeling languages in order to assess their applicability in given
modeling contexts ... Schrijf als eerste een reactie |
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Vandana Kabilan
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Business Process Models are typically used to express inter or intra –enterprise business activities/processes. Contractual obligations need to be fulfilled through execution of business processes on behalf of the contracting parties . To do so, business contract terms and conditions need to be semantically integrated to existing internal business process models. Contract obligation, performance, non-performance and other related concepts have been expressed as conceptual models in a Multi-Tier Contract Ontology (MTCO). Based on the MTCO, business process modelers may model the contract obligation fulfillment process as Contract Workflow Models(CWM) using Business Process Modeling Notation (BPMN) diagrams. ...
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Anna Gunhild Nysetvold, John Krogstie
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We describe in this paper an insurance company that has recently wanted to standardize on business process modeling language. To perform the evaluation, a generic framework for assessing the quality of models and modeling languages was specialized to the needs of the company. Three different modeling languages were evaluated according to the specialized criteria.
The work illustrates the practical utility of the overall framework, where language quality features are looked upon as means to enable the creation of models of high quality. It also illustrates the need for specializing this kind of general framework based on the requirements of the specific organization.
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Terje Wahl, Guttorm Sindre
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Evaluation of modelling languages is important both to be able to select the most suitable languages according to the needs, and to improve existing languages. In this paper Business Process Modeling Notation (BPMN) is presented and analytically evaluated according to the Semiotic Quality Framework. BPMN is a functionally oriented language well suited for modeling within the domain of business processes, but probably also general processes not only within the business domain. The evaluation indicates that BPMN is easily learned for simple use, and Business Process Diagrams (BPDs) are relatively easy to understand. Tools may fairly easily map BPDs into the BPEL4WS format, but executable systems then require creation of Web Services representing the Activities in BPDs. ...
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Terry Halpin
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Some information modeling approaches allow instances of relationships
to be treated as entities in their own right. In the Unified Modeling Language
(UML), this is called “reification”, and is mediated by association
classes. In Object-Role Modeling (ORM), this is called “objectification” or
“nesting”. While this modeling option is rarely supported by industrial versions
of Entity-Relationship Modeling (ER), some academic ER versions do support
it. Objectification is related to the linguistic activity of nominalization, of which
two flavors may be distinguished: circumstantial; and propositional. In practice,
objectification is prone to misuse, and some modeling approaches provide incomplete
or flawed support for it. ... Schrijf als eerste een reactie |
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Vladimir Ovchinnikov
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The paper is focused on a concept-based query language that permits querying by using only application domain concepts. The query language has features making it simple and transparent for end-users: each query operation is completely defined by its result signature and nested operation’s signatures; a query’s signature represents an unordered set of application domain concepts; join predicates are not to be specified in an explicit form. In addition, the paper introduces constructions of closures and contexts as applied to the language. The constructions permit querying some indirectly associated concepts as if they are associated directly and adopting queries to users’ needs without rewriting. All the properties make query creation and reading simpler in comparison with other known query languages. This query language is named as SCQL (Semantically Complete Query Language). Schrijf als eerste een reactie |
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