RT Dissertation/Thesis
T1 Integración de patrones en el proceso de diseño de sistemas hipermedia mediante el uso de ontologías
A1 Montero Moreno, Susana
AB Los métodos de diseño hipermedia asisten al diseñador a través de una serie de fases y productos. Sin embargo, un diseñador, tanto si es experto como no, puede llegar a tomar una solución inadecuada a un determinado problema de diseño que puede ser perjudicial para el usuario. Los patrones de diseño son ese mecanismo que puede ayudar a aliviar tanto el acometido de nuevos desarrollos como la dificultad en la toma de decisiones para la mejora de sistemas ya existentes, en tanto en cuanto puedan integrarse de forma eficiente con los métodos de diseño y sean accesibles de manera efectiva a los diferentes integrantes del equipo de desarrollo. Para resolver estas carencias, el primer objetivo de esta tesis ha sido organizar el conocimiento de los pdh, proporcionando unos criterios de clasificación, un catálogo de patrones, un lenguaje de patrones y un marco de integración con los métodos de diseño, en el cual un conjunto de pasos guían una aproximación basada en patrones que permite transformar la especificación de requisitos en entidades de diseño en el modelado conceptual, gracias a las soluciones capturadas por los patrones. Además para poder automatizar este conjunto de herramientas se ha propuesto un modelo de representación semántico basado en ontologías que permite mantener enlazada la representación textual del patrón mediante anotaciones, haciendo a los patrones mutuamente comprensibles a diseñadores y a programas.
AB ______________________________________________The development of large-scale hypermedia and web systems must be carried out followinga well defined systematic process, that is, applying hypermedia and web engineeringmethods and techniques. In addition, considering that the development process of websystems is characterized by obtaining an operative product in a short period of time, designerscan alleviate decision making resorting to design patterns. A design pattern recordsthe knowledge and the experience of domain experts on how to make a software systemmore reusable and flexible as a result of many efforts on the design and codification of systems.Currently, if a designer or a developer of hypermedia applications wants to solve orto communicate a specific design problem by means of hypermedia design patterns (hdp),as starting point, she would have to search across multiple existing publications or some ofweb repositories available in order to identify the pattern or patterns that best fit her needs.To date, the necessary mechanisms to help the designer to find the appropriate pattern orpatterns and to integrate them into hypermedia design methods do not exist. Therefore,the success of this activity will depend only on the designer knowledge about the existingresources and her experience in the use of patterns.In order to solve these lacks, the first aim of this thesis has been to organize the knowledgeof hdp, providing a set of classification criteria which takes into account as muchhypermedia application modeling needs as the different levels of abstraction used in thepdh literature. From these criteria, a pattern catalogue has been elaborated to facilitate thesearch of patterns during the resolution of particular design problems as well as a patternlanguage as a step-by-step guide that advises designers how to accomplish the design processfrom different levels of abstraction, whereas it proposes alternative problems to resolve.Finally, from the pattern language, an integration framework with design methods hasbeen specified, in which a set of steps guides a pattern based approach to transform requirementsspecifications to design entities into the conceptual modeling, thanks to the solutionscaptured by patterns. This process has been evaluated in an empirical way to verify its validityand utility.Once the space and the knowledge of patterns are organized, new challenges and realitiesshould be faced up to. In particular, the great amount of patterns and its differentsources, even counting on the mechanisms before mentioned, lead a non-experienced des-igner in the use of patterns to the necessity to explore most of them, in addition to the effortto understand when and how the pattern must be applied. At this stage, it is worth countingon software tools that allow for the organization, recovery and exploration of patterns withsearches dedicated to finding appropiate patterns to generic design problems as well as theirapplication in other software systems, such as CASE tools. However, firstly it is necessaryto share a formal specification of patterns in order to preserve compatibility among softwaretools. To date, the hypermedia engineering field does not have its own formalizationthat allows the development of software tools for patterns, and the formalizations proposedin the software engineering field only take into account the pattern solution and leave asidethe textual pattern description, so important to understand the foundation that underlies pattern’sproblem and solution. All elements of a pattern are required to develop effective toolsfor patterns organization, recovery and exploration. For example, to include the intention ofpattern would allow for indexing patterns according to the problem that solve, helping usersto find the appropiate pattern for a design problem.For that reason, a semantic representation model based on ontologies that combinesthe domain knowledge about hypermedia used for the pattern description with the patternformat has been proposed. Afterwards, this representation provides the underlying frameworkto complement the textual pattern representation by means of semantic annotations,which is supported by a tool that helps both users and authors of patterns to formalizetheir own repositories. This combination of the formal representation linked to the textualpattern representation by means of annotations allows to patterns to be mutually comprehensibleby designers and programs. An example of this is the development of a semantic webrepository and the automatization of the integration process of hdp in a tool support for thedesign of hypermedia applications, using both developments the pattern language formalizedby means of the annotation tool proposed. The development of these tools have proventhe technical feasibility of the solution here proposed.
YR 2005
FD 2005
LK https://hdl.handle.net/10016/671
UL https://hdl.handle.net/10016/671
LA spa
DS e-Archivo
RD 18 may. 2024