hytime

from The Free On-line Dictionary of Computing (8 July 2008)

HyTime

   Hypermedia/Time-based Structuring Language: an emerging
   ANSI/ISO Standard from the {SGML} Users' Group's Special
   Interest Group on Hypertext and Multimedia (SIGhyper).  A
   hypermedia extension of {SGML}.

   ["The HyTime Hypermedia/Time-based Document Structuring
   Language", S. Newcomb et al, CACM 34(11):67-83 (Nov 1991)].

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

HYTIME
       Hypermedia/Time-based structuring language (SGML, ISO, IEC, IS
10744), "HyTime"