Keywords: knowledge management, Web applications, CAN data, MSSQL Server, ASP.NET, patterns, layered architecture, LINQ, object-relational mapping, schema evolution
Astract: A sustainable knowledge management and sophisticated tool support are extremely important for every successfully operating company. Within an extremely wide range of tools, Web applications gain more and more importance to meet the constantly increasing requirements.
Outstanding benefits are worldwide accessibility and interoperability on a very large scale. Moreover, in many cases no installation on single clients is needed, updates can be provided easily, and centralized data management on the server-side avoids costly synchronizations. These factors lead to reduced costs for the information infrastructure and support the employees to do their work. For example, a constructor of fire-fighting trucks can query the headquarter's database on the other side of the world to find out which CAN data (Controller Area Network) is needed to configure a specific vehicle.
Building such solutions is not a trivial task and therefore disciplines like Web Engineering and Internet Computing emerged. Furthermore, developers can choose from a wide range of technologies to realize their solutions. Handling these technologies leads to successful development of Web applications. This master's thesis describes in detail the solution for a specific problem in the industry, namely a Web application called CORA (CAN Bus Organization - Rosenbauer Assistant) to manage the CAN data for Rosenbauer International AG. According to the company's IT-infrastructure MSSQL Server, IIS, and ASP.NET were chosen as core technologies. On one hand the .NET framework provides the possibility to develop applications in a rather short time, also known as Rapid Application Development (RAD). On the other hand many RAD-techniques are not applicable on large enterprise solutions where the complexity has to be broken down into several layers. This work presents approaches, patterns and techniques for each layer.
The Data Access Layer is responsible for retrieving and manipulating data and uses LINQ to SQL as object-relational mapper. The Business Layer handles the communication to external systems and adds business functionality between the Data Access Layer and the Presentation Layer.
Finally, the Presentation Layer presents the data in an appropriate format and handles the user interaction.
Furthermore, the database schema of the sample application has been constantly renewed and improved to cover additional requirements like multiple CAN bus systems, multilingualism, user administration, and a history of important entities. Therefore, schema evolution and data migration play an additional important role in this thesis. All these aspects are elaborated theoretically and explained practically with the help of CORA.

Keywords: accessibility, web, software engineering, code generation
Astract: Model engineering is a current trend in software engineering.
Its aim is the automatic generation of executable code from abstract software models. Latest techniques focus mainly on functional aspects of the generated code, e.g. how Java code is generated from UML diagrams.
However, aspects of quality which do not come from the technical requirements are rarely considered. An important aspect of quality represents among other things the accessibility of web pages.
Legislation in Austria requires a barrier free access to official internet appearances for humans with special needs. This should have been implemented until 1st of Jan. 2008. In order to determine the accessibility of web applications so called Web Accessibility Guidelines (WAG) have been developed. For example, there are the WCAG (Web Content Accessibility Guidelines)of the W3C, which already became generally accepted as a de facto web accessibility standard. In order to fulfil the conformity with the legal regulations demanded above, public internet appearances must correspond to the respectively demanded guidelines. In this diploma thesis it is evaluated, in which way modern component frameworks and code generators fulfil the requirements resulting from the given guidelines. Therefore, WAG conform static html pages are used as a starting point. These static pages are developed to dynamic web applications by means of chosen component frameworks and code generators. The result of the generation process of each chosen development technology is finally rendered in form of html pages in the browser. These rendered pages are evaluated by means of WAG evaluation tools (test programs for the WAG conformance) regarding guidelines selected before. The results of this conformance evaluation demonstrate, to which extent the selected Web accessibility guidelines are violated. This evaluation also highlights which of the used development environments are better in terms of WAG conformance.

Keywords: RIA, e-Learning, UML, Visualization, Diagrams, Class Diagrams, Modeling, Metamodeling, Model Engineering, Web
Astract: The ability of software engineers to develop clear and comprehensive models according to a specific problem domain has become an essential factor for the success of software projects. The trend of Model Driven Software Engineering (MDSE) even increases this factor.
Universities have to qualitatively educate their students in this field to prepare them for those challenges.
At the Vienna university of Technology (VUT), the course "Object Oriented Modeling" teaches the basics of modeling and the Unified Modeling Language (UML). Due to the high number of students, various e-Learning elements have already been established, mainly for teaching the theory behind UML.
The goal of this thesis was to develop a web-based modeling tool, that is integrated into the e-Learning platform of the VUT using Rich Internet Application technologies. Thus, students can solve practical modeling exercises comfortably and directly using the e-Learning platform. Therefore, a generic approach shall be used by utilizing metamodeling: Visualization and manipulation of two-dimensional diagrams is based on certain patterns. A framework was created, that allows for creating complete diagram editors with drag-and-drop functionality, by specifying the structure of the diagram elements (abstract syntax) and the visual notation elements (concrete syntax). This enables to easily create various UML editors and to align the notation elements with those of the course. Within this thesis, three editors (class diagram, state diagram, and sequence diagram) have been created with the aid of the framework and integrated into the e-Learning platform.

Keywords: UML, UML 2.0, Unified Modeling Language, modeling
Astract: In 2005 the Object Management Group (OMG) adopted the UML 2.0, a new version of the Unified Modeling Language which is said to be more compact, understandable and coherent.
The main criticism of the UML 1.x is its extensive and complex format which inhibits learners from quickly utilizing the functions the program offers.1 This thesis dealt with the question of whether the UML 2.0 has become more effective an efficient. This question can be addressed through the creation of a software project in which all UML 2.0 diagrams are used.
The theoretical part contains a historical description of the UML as well as the diagram types. Ultimately, the objective is to create diagrams which enables the reader to quickly comprehend the operations of the UML 2.0. The description of the software project is also included in the theoretical part. The software project is about the combining of single software systems of an enterprise into one. The objective of the enterprise is to work with one single system instead of using several systems.
Within the practical part a set of criteria was prepared which critically questioned the different aspects of the diagrams.

Keywords:
Astract: Model integration is one of the core components for the realization of model-driven engineering. In particular, the seamless exchange of models among different modeling tools is of special importance. This exchange is achieved by the means of model transformations. However, the manual definition of model transformations is an error prone and cumbersome task. So matching techniques, originally intended for database schema integration, have been reused. The result is unsatisfactory as current matching approaches typically produce only one-toone alignments which are inappropriate for many integration problems. As a consequence, a detailed review and a manual post-processing step is often necessary. To tackle these problems, we propose the self-tuning framework SmartMatcher for improving automatically generated transformations. Our approach combines the power of an executable mapping language for bridging structural heterogeneities with the strength of an instance based quality evaluation model. In an iterative, feedback-driven process a mapping between two schemas is constructed and repeatedly enhanced.