Keywords: XML schema metrics, data representation, W3C, SOA, empirical validation, data representation
Received December 14, 2007; accepted March 3, 2008.
Communicated by Jonathan Lee, Wei-Tek Tsai and Yau-Hwang Kuo.
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DILEK BASCI AND SANJAY MISRA
Department of Computer Engineering
Atilim University
Ankara, Turkey
The eXtensible Markup Language (XML) has been gaining extraordinary acceptance
from many diverse enterprise software companies for their object repositories, data
interchange, and development tools. Further, many different domains, organizations and
content providers have been publishing and exchanging information via internet by the
usage of XML and standard schemas. Efficient implementation of XML in these domains
requires well designed XML schemas. In this point of view, design of XML
schemas plays an extremely important role in software development process and needs
to be quantified for ease of maintainability. In this paper, an attempt has been made to
evaluate the quality of XML schema documents (XSD) written in W3C XML Schema
language. We propose a metric, which measures the complexity due to the internal architecture
of XSD components, and due to recursion. This is the single metric, which
cover all major factors responsible for complexity of XSD. The metric has been empirically
and theoretically validated, demonstrated with examples and supported by comparison
with other well known structure metrics applied on XML schema documents.
Received December 14, 2007; accepted March 3, 2008.
Communicated by Jonathan Lee, Wei-Tek Tsai and Yau-Hwang Kuo.