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    Modeling views in the layered view model for XML using UML

    19661_downloaded_stream_179.pdf (2.947Mb)
    Access Status
    Open access
    Authors
    Chang, Elizabeth
    Rajugan, R.
    Dillon, Tharam S.
    Feng, L.
    Date
    2006
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Chang, Elizabeth and Rajugan, R. and Dillon, Tharam and Feng, Ling. 2006. Modeling views in the layered view model for XML using UML. Journal of Web Information Systems 2 (2): 95-117.
    Source Title
    Journal of Web Information Systems
    Additional URLs
    http://doc.utwente.nl/66983/1/889.pdf
    Faculty
    Curtin Business School
    School of Information Systems
    School
    Centre for Extended Enterprises and Business Intelligence
    Remarks

    Originally published in the International Journal of Web Information Systems.

    URI
    http://hdl.handle.net/20.500.11937/31446
    Collection
    • Curtin Research Publications
    Abstract

    In data engineering, view formalisms are used to provide flexibility to users and user applications by allowing them to extract and elaborate data from the stored data sources. Conversely, since the introduction of Extensible Markup Language (XML), it is fast emerging as the dominant standard for storing, describing, and interchanging data among various web and heterogeneous data sources. In combination with XML Schema, XML provides rich facilities for defining and constraining user-defined data semantics and properties, a feature that is unique to XML. In this context, it is interesting to investigate traditional database features, such as view models and view design techniques for XML. However, traditional view formalisms are strongly coupled to the data language and its syntax, thus it proves to be a difficult task to support views in the case of semi-structured data models. Therefore, in this paper we propose a Layered View Model (LVM) for XML with conceptual and schemata extensions. Here our work is three-fold; first we propose an approach to separate the implementation and conceptual aspects of the views that provides a clear separation of concerns, thus, allowing analysis and design of views to be separated from their implementation. Secondly, we define representations to express and construct these views at the conceptual level. Thirdly, we define a view transformation methodology for XML views in the LVM, which carries out automated transformation to a view schema and a view query expression in an appropriate query language. Also, to validate and apply the LVM concepts, methods and transformations developed, we propose a view-driven application development framework with the flexibility to develop web and database applications for XML, at varying levels of abstraction.

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