Development of an interface for ontology‐based transformation between features of different types

Dissertation submitted in partial fulfilment of the requirements for the Degree of Master of Science in Geospatial TechnologiesImplementation of the INSPIRE directive, the spatial data infrastructure for the Europe, has created a necessity for easy and convenient conversion between different models of geospatial data. Data model transformation across heterogeneous systems can be hampered by differences in terminology and conceptualization, particularly when multiple communities are involved. Requirement in current situation is an interface facilitating transformation of data to a desired format and immediate use of the data, which are collected from different formats and models. Ontology-aware software with shared understanding of concepts, enable users to interact with geospatial data models. Thus use of ontologies could make a friendly environment to the user in translating the data conveniently. Feature type ontologies, along with annotations are provided from an ongoing project at the Institute for Geoinformatics (IfGI, University of Münster, Germany), in order to reconcile differences in semantics. FME workbench provides a successful environment to execute set of rules for the data model transformation using a mapping file, which can be developed externally. The thesis work developed a user interface that includes operations to define rules for the translation of geospatial data, from one model to another. Annotated feature types are taken as input, and the results are encoded as FME Mapping files. The overall methodology involves three phases.(...

Integrating semantic business process management and viewbased modeling

Mit dem zunehmenden Interesse an Service Orientierten Architekturen und den damit verbundenen Technologien, wie zum Beispiel Web Services und der Business Process Execution Language (BPEL), hat Geschäftsprozessmanagement in den letzten Jahren an Bedeutung gewonnen. Dennoch besteht eine Kluft zwischen der Gestaltung von Geschäftsprozessen, wie sie von ExpertInnen der Geschäftswelt durchgeführt wird, und deren Ausführung, die von IT-ExpertInnen umgesetzt und gewartet wird. Derzeit gibt es intensive Forschungsansätze im Bereich semantischer Technologien, die hohe Automatisierbarkeit versprechen, sodass diese Kluft weitgehend oder sogar vollständig überwunden werden soll. Erreicht werden soll dies durch eine wohldefinierte Wissensrepräsentation, die logisches Schließen erlaubt, auf der einen Seite sowie Generation von ausführbarem Code auf der anderen Seite. In dieser Magisterarbeit analyisieren wir die Möglichkeiten, ontologisiertes Wissen in ausführbaren Code zu übersetzen und präsentieren einen allgemeinen Entwicklungsprozess, der die Möglichkeiten von Modellgetriebener Softwareentwicklung (Model Driven Software Development, MDSD) nützt, um dieses Ziel zu erreichen. Dieser allgemeine Prozess wird dann an Hand einer konkreten Implementierung im Rahmen des SemBiz Projekts evaluiert. Im Rahmen des Projektes gibt es eine Semantische Schicht, basierend auf der Web Service Modeling Ontology (WSMO), die Abfrage und Schließen über die Prozesse der Wissensbasis ermöglicht, und eine Modellgetriebene Schicht basierend auf dem Eclipse Modeling Framework (EMF), die für Prozessabstraktion und Codegenerierung verwendet wird.With the increasing interest in Service Oriented Architectures and related technologies, such as Web Services and the Business Process Execution Language (BPEL), Business Process Management (BPM) has become more and more important in recent years. However, there still exists a gap between Business Process Modeling, as it is done by business experts, and Business Process Deployment and Execution, as it is maintained by IT Experts. Currently, a lot of research is going on in the field of semantic technologies, which promise to enable a high level of automation to narrow or even close this gap. This should be achieved through a well-defined knowledge representation which allows reasoning on the one hand and generation of executable code on the other hand. In this thesis, we analyze the options to transfer ontologized knowledge representations into executable code and suggest a generic engineering process model using the facilities of Model Driven Software Development (MDSD) to fulfill this goal. This generic process is evaluated by introducing a concrete implementation done for the SemBiz project, where a semantic layer based on the Web Service Modeling Ontology (WSMO) is used for querying and reasoning over the process space, and a MDSD layer based on Eclipse Modeling Framework (EMF) is used for process abstraction and code generation

IRS-III: A broker-based approach to semantic Web services

A factor limiting the take up of Web services is that all tasks associated with the creation of an application, for example, finding, composing, and resolving mismatches between Web services have to be carried out by a software developer. Semantic Web services is a combination of semantic Web and Web service technologies that promise to alleviate these problems. In this paper we describe IRS-III, a framework for creating and executing semantic Web services, which takes a semantic broker based approach to mediating between service requesters and service providers. We describe the overall approach and the components of IRS-III from an ontological and architectural viewpoint. We then illustrate our approach through an application in the eGovernment domain

iSemServ : a framework for engineering intelligent semantic services

The need for modern enterprises and Web users to simply and rapidly develop and deliver platform-independent services to be accessed over the Web by the global community is growing. This is self-evident, when one considers the omnipresence of electronic services (e-services) on the Web. Accordingly, the Service-Oriented Architecture (SOA) is commonly considered as one of the de facto standards for the provisioning of heterogeneous business functionalities on the Web. As the basis for SOA, Web Services (WS) are commonly preferred, particularly because of their ability to facilitate the integration of heterogeneous systems. However, WS only focus on syntactic descriptions when describing the functional and behavioural aspects of services. This makes it a challenge for services to be automatically discovered, selected, composed, invoked, and executed – without any human intervention. Consequently, Semantic Web Services (SWS) are emerging to deal with such a challenge. SWS represent the convergence of Semantic Web (SW) and WS concepts, in order to enable Web services that can be automatically processed and understood by machines operating with limited or no user intervention. At present, research efforts within the SWS domain are mainly concentrated on semantic services automation aspects, such as discovery, matching, selection, composition, invocation, and execution. Moreover, extensive research has been conducted on the conceptual models and formal languages used in constructing semantic services. However, in terms of the engineering of semantic services, a number of challenges are still prevalent, as demonstrated by the lack of development and use of semantic services in real-world settings. The lack of development and use could be attributed to a number of challenges, such as complex semantic services enabling technologies, leading to a steep learning curve for service developers; lack of unified service platforms for guiding and supporting simple and rapid engineering of semantic services, and the limited integration of semantic technologies with mature service-oriented technologies. vi In addition, a combination of isolated software tools is normally used to engineer semantic services. This could, however, lead to undesirable consequences, such as prolonged service development times, high service development costs, lack of services re-use, and the lack of semantics interoperability, reliability, and re-usability. Furthermore, available software platforms do not support the creation of semantic services that are intelligent beyond the application of semantic descriptions, as envisaged for the next generation of services, where the connection of knowledge is of core importance. In addressing some of the challenges highlighted, this research study adopted a qualitative research approach with the main focus on conceptual modelling. The main contribution of this study is thus a framework called iSemServ to simplify and accelerate the process of engineering intelligent semantic services. The framework has been modelled and developed, based on the principles of simplicity, rapidity, and intelligence. The key contributions of the proposed framework are: (1) An end-to-end and unified approach of engineering intelligent semantic services, thereby enabling service engineers to use one platform to realize all the modules comprising such services; (2) proposal of a model-driven approach that enables the average and expert service engineers to focus on developing intelligent semantic services in a structured, extensible, and platform-independent manner. Thereby increasing developers’ productivity and minimizing development and maintenance costs; (3) complexity hiding through the exploitation of template and rule-based automatic code generators, supporting different service architectural styles and semantic models; and (4) intelligence wrapping of services at message and knowledge levels, for the purposes of automatically processing semantic service requests, responses and reasoning over domain ontologies and semantic descriptions by keeping user intervention at a minimum. The framework was designed by following a model-driven approach and implemented using the Eclipse platform. It was evaluated using practical use case scenarios, comparative analysis, and performance and scalability experiments. In conclusion, the iSemServ framework is considered appropriate for dealing with the complexities and restrictions involved in engineering intelligent semantic services, especially because the amount of time required to generate intelligent semantic vii services using the proposed framework is smaller compared with the time that the service engineer would need to manually generate all the different artefacts comprising an intelligent semantic service. Keywords: Intelligent semantic services, Web services, Ontologies, Intelligent agents, Service engineering, Model-driven techniques, iSemServ framework.ComputingD. Phil. (Computer science

E-business framework enabled B2B integration

Standards for B2B integration help to facilitate the interoperability between organisations. These standards, often called e-business frameworks, guide integration by specifying the details for business processes, business documents and secure messaging. Extensible Mark-up Language (XML) is used in modern e-business frameworks instead of Electronic Data Interchange (EDI) formats. Having XML as the data format is not enough for integration, but e-business frameworks are needed to guide how XML is used. This work analyses the many partly competing and overlapping e-business frameworks how they differ in support for business processes, documents and secure messaging. In addition, the effect of standardisation organisation to the outcome of the e-business framework is studied. In this work, one e-business framework, RosettaNet, is used to tackle the challenges of product development (PD) integrations. A proof-of-concept implementation of a RosettaNet integration is provided to support PD and the lessons learned are discussed. The current specifications lack good processes for PD integrations, while they fail in specifying the concepts needed for document management. Furthermore, there are interoperability problems due to a lack of expressivity of the schema languages to encode the business documents, and the current setup of integration takes a very long time. RosettaNet has a lot of flexibility in the specifications, and thus just supporting the same standard process is not enough for interoperability. With semantic technologies, many shortcomings of the current standards for B2B integration can be solved, as they make it possible to present constraints the current technologies have problems with. This work presents a practical case of B2B integration with semantic technologies and describes the benefits of applying such technologies.Standardit tukevat organisaatioiden välistä järjestelmäintegraatiota. Integroinnin standardit määrittelevät organisaatioiden välisiä liiketoimintaprosesseja, -dokumentteja sekä määrittelevät turvallisen tavan kommunikoida. Nykyaikaiset standardit ovat XML-perusteisia vanhemman EDI-formaatin sijaan. XML:n käyttö ei ole riittävästi takaamaan integraation onnistumista, vaan tarvitaan tarkempaa sopimista, miten XML:ää käytetään integraatiossa. Joukko yritystenvälisen integroinnin standardeja määrittelee tämän. Tässä työssä analysoidaan useaa, osittain kilpailevaa, yritystenvälisen integroinnin standardia ja tutkitaan miten ne tukevat liiketoimintaprosessien, -dokumenttien ja turvallisen viestinvälityksen määrittelyjä ottaen huomioon myös standardointiorganisaation vaikutuksen lopputulokseen. Tässä työssä RosettaNet-standardia sovelletaan tuotekehitykseen liittyvissä integroinneissa. Työssä esitetään prototyyppi tuotekehitystiedon integroinnista RosettaNetin avulla ja keskustellaan saavutetuista kokemuksista. Nykyiset spesifikaatiot tuotekehitysprosesseille ovat tarpeisiin riittämättömiä, koska tuki dokumenttien hallinnan käsitteistölle on puutteellinen. Myös RosettaNetin käyttämien XML-skeemakielien puutteellinen ilmaisuvoima aiheuttaa ongelmia dokumenttien yhteentoimivuudelle. Lisäksi integraation tekeminen on hidasta verrattuna tyypillisen tuotekehitysprojektin kestoon. RosettaNetin tarjoamissa spesifikaatioissa on paljon joustavuutta, joten saman standardiprosessin tukeminen ei tarkoita, että järjestelmät ovat yhteentoimivia. Nykyspesifikaatioissa ja niissä käytettyjen skeema-kielten ilmaisuvoiman puutteet voidaan osittain paikata käyttämällä semanttisia teknologioita. Tämä työ esittää, miten integraatioissa voidaan saavuttaa semanttisia teknologioita käyttämällä parempi yhteentoimivuus.reviewe

Specification of the delivery alignment format

euzenat2005hThis deliverable focusses on the definition of a delivery alignment format for tools producing alignments (mapping tools). It considers the many formats that are currently available for expressing alignments and evaluate them with regard to criteria that such formats would satisfy. It then proposes some improvements in order to produce a format satisfying more needs

Semantic Content Mediation and Acquisition: The Challenge for Semantic e-Business Solutions

A Top Quadrant report situates the Semantic Web within the current Innovation Wave of “Distributed Intelligence”. This is one of the main innovation waves of the last centuries including textile, railway, auto, computer, distributed intelligence (1997-2061) and nanotechnology (2007-2081). The Distributed Intelligence wave started in the late nineties and is expected to peak between 2010 and 2020. The report estimates first return on investments in 2006-7, growing to a market of $40-60 billion in 2010. Funds are coming primary from governments, venture capitalists and industry commercialization. Over the next few years, this is expected to change in favour of industry commercialization

Design Approach to Unified Service API Modeling for Semantic Interoperability of Cross-enterprise Vehicle Applications

This work was partially supported by Ministry of Education, Youth and Sports of the Czech Republic, university specific research, project SGS-2019-018 Processing of heterogeneous data and its specialized applications

SYMEX: A Systems Theory based Framework for Workflow Modelling and Execution

Workflow management systems enable organisations to deal with all aspects of business process management, including analysis, modelling, execution, and administration. Modelling workflow processes involves transformation of the process logic into a formal representation and it always remains a critical success factor for these systems. Workflow modelling languages provide constructs for capturing high-level descriptions of business processes, which are then have to be transformed and encoded into low-level execution semantics with the use of workflow programming languages. However, maintaining these models separately results in a number of issues, particularly when the various interdependencies between them are managed manually. This primarily creates difficulties in adaptation, in terms of identifying changes in high-level descriptions due to modifications of business conditions, and tracing the impact of those changes on the low-level execution semantics. Moreover, certain information included in the high-level descriptions is either partly encoded or omitted from the low-level execution semantics and at the same time, complicated business rules encoded at the execution level are not included in the high-level descriptions, creating major inconsistencies. The above issues result in high maintenance costs, reducing the overall efficiency and performance of workflow management systems. This thesis addresses the aforementioned problems by proposing a framework named SYMEX. SYMEX addresses the issue of integrating high and low-level descriptions in one unified format, from a Systems Theory perspective. SYMEX models have a mathematically defined formalism capable of capturing both high-level descriptions of business processes and low-level workflow execution semantics. Furthermore, SYMEX offers a concise and easy to learn and communicate set of constructs, allowing business analysts, process designers, and programmers to work on the same model, at different levels of abstraction. Apart from the theoretical framework, an XMLbased approach for the application of SYMEX is proposed, along with a constraint- based inference engine. Additionally, SYMEX models are evaluated in terms of their complexity and prove easier to read, understand, and manage than other traditional workflow modelling approaches. However, further research is required to assess the capability of the framework, with respect to modelling workflow processes in a service-oriented environment, where activities of business processes are essentially web-services exposed on the Internet