\contentsline {chapter}{List of Tables}{v}
\contentsline {chapter}{List of Figures}{vi}
\contentsline {chapter}{Abstract}{1}
\contentsline {chapter}{Acknowledgments}{3}
\contentsline {chapter}{\numberline {1}Introduction}{1}
\contentsline {section}{\numberline {1.1}Background}{1}
\contentsline {section}{\numberline {1.2}Research Questions}{3}
\contentsline {section}{\numberline {1.3}Theses Outline}{3}
\contentsline {chapter}{\numberline {2}Component Based Software Development}{5}
\contentsline {section}{\numberline {2.1}Java Components}{6}
\contentsline {subsection}{\numberline {2.1.1}Background}{6}
\contentsline {subsection}{\numberline {2.1.2}JavaBeans}{6}
\contentsline {subsection}{\numberline {2.1.3}Enterprise JavaBeans}{7}
\contentsline {subsubsection}{Lifecycle}{8}
\contentsline {subsubsection}{State Management}{8}
\contentsline {subsubsection}{Security}{9}
\contentsline {subsubsection}{Transactions}{9}
\contentsline {subsubsection}{Persistence}{9}
\contentsline {subsection}{\numberline {2.1.4}Comparing JavaBean Components and Enterprise Beans}{9}
\contentsline {section}{\numberline {2.2}CORBA}{10}
\contentsline {subsection}{\numberline {2.2.1}Background}{10}
\contentsline {subsubsection}{Object Request Broker}{11}
\contentsline {subsubsection}{Object Services}{12}
\contentsline {subsubsection}{Common Facilities}{12}
\contentsline {subsubsection}{Domain Interfaces}{13}
\contentsline {subsection}{\numberline {2.2.2}CORBA Components}{13}
\contentsline {section}{\numberline {2.3}The Component Object Model}{14}
\contentsline {subsection}{\numberline {2.3.1}Background}{14}
\contentsline {subsection}{\numberline {2.3.2}Interfaces}{15}
\contentsline {subsection}{\numberline {2.3.3}IUnkown}{17}
\contentsline {subsection}{\numberline {2.3.4}COM/DCOM/OLE Architecture}{20}
\contentsline {subsubsection}{OLE Compound Documents}{21}
\contentsline {subsubsection}{ActiveX Controls}{21}
\contentsline {subsubsection}{Fundamental Services}{21}
\contentsline {subsection}{\numberline {2.3.5}MIDL}{23}
\contentsline {subsection}{\numberline {2.3.6}GUIDs}{23}
\contentsline {subsection}{\numberline {2.3.7}HRESULT}{23}
\contentsline {subsection}{\numberline {2.3.8}Development using ATL}{25}
\contentsline {subsection}{\numberline {2.3.9}Dual Interfaces}{29}
\contentsline {subsection}{\numberline {2.3.10}Aggregation}{29}
\contentsline {subsection}{\numberline {2.3.11}Marshalling}{30}
\contentsline {subsection}{\numberline {2.3.12}The Registry}{30}
\contentsline {subsection}{\numberline {2.3.13}Introducing Categories}{31}
\contentsline {section}{\numberline {2.4}Locating Services in COM and CORBA}{32}
\contentsline {chapter}{\numberline {3}Comparison of Categories and the Trading Service}{33}
\contentsline {section}{\numberline {3.1}CORBA Trading Service}{33}
\contentsline {subsection}{\numberline {3.1.1}The Trader Type Librarian}{34}
\contentsline {section}{\numberline {3.2}Categorisation}{35}
\contentsline {section}{\numberline {3.3}Comparing Categorisation with the Type Librarian}{37}
\contentsline {section}{\numberline {3.4}Anticipated Problems}{37}
\contentsline {chapter}{\numberline {4}Development and Design of a Categorisation system}{39}
\contentsline {section}{\numberline {4.1}Description of Problem}{40}
\contentsline {section}{\numberline {4.2}System Design}{40}
\contentsline {subsection}{\numberline {4.2.1}Category Program}{40}
\contentsline {subsection}{\numberline {4.2.2}Calculator Programs}{42}
\contentsline {subsection}{\numberline {4.2.3}The Register Program}{43}
\contentsline {chapter}{\numberline {5}Implementation and analysis of the system}{45}
\contentsline {section}{\numberline {5.1}Results}{46}
\contentsline {section}{\numberline {5.2}Analysis of implementation}{46}
\contentsline {subsection}{\numberline {5.2.1}RegisterCategories Program}{47}
\contentsline {subsection}{\numberline {5.2.2}Categorisation Program}{49}
\contentsline {section}{\numberline {5.3}Analysis of results}{51}
\contentsline {subsection}{\numberline {5.3.1}Categorising}{51}
\contentsline {chapter}{\numberline {6}Conclusion}{53}
\contentsline {section}{\numberline {6.1}Research Assessment}{53}
\contentsline {section}{\numberline {6.2}Future Work}{55}
\contentsline {chapter}{Appendix A: Categories Program}{60}
\contentsline {chapter}{Appendix B: Calculators}{78}
\contentsline {chapter}{Appendix C: Register Program}{115}