Why use HyTime?

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\begin{bibtex} @article{DBLP:journals/epodd/CarrBDH94, title={Why use HyTime?}, pages={163-178}, year={1994}, volume={7}, journal={Electronic Publishing}, number={3}, url={http://www.informatik.uni-trier.de/~ley/db/journals/epodd/epodd7.html#CarrBDH94}, author={Les Carr and D. W. Barron and Hugh C. Davis and Wendy Hall} }\end{bibtex}