\contentsline {section}{\numberline {1}Introduction}{3}
\contentsline {section}{\numberline {2}Vision of Digital Libraries}{4}
\contentsline {subsection}{\numberline {2.1}Information Tokens}{4}
\contentsline {subsection}{\numberline {2.2}Information Artifacts}{5}
\contentsline {subsection}{\numberline {2.3}Binding Environments}{6}
\contentsline {subsection}{\numberline {2.4}Tracing Environments}{7}
\contentsline {section}{\numberline {3}Software Requirements for Digital Libraries}{8}
\contentsline {subsection}{\numberline {3.1}Linguistic Requirements}{8}
\contentsline {subsection}{\numberline {3.2}Architectural Requirements}{10}
\contentsline {section}{\numberline {4}Tycoon as a Framework for Digital Libraries}{12}
\contentsline {subsection}{\numberline {4.1}Achievements of the Tycoon Language}{12}
\contentsline {subsection}{\numberline {4.2}The Tycoon System Architecture}{15}
\contentsline {section}{\numberline {5}The Warburg Electronic Library Project}{20}
\contentsline {subsection}{\numberline {5.1}The Application Domain}{20}
\contentsline {subsection}{\numberline {5.2}Tokens and Artifacts in the Warburg Electronic Library}{21}
\contentsline {subsection}{\numberline {5.3}Personal Reference Libraries}{22}
\contentsline {section}{\numberline {6}Conclusions and Future Research}{23}