Formatting Output Specification Instance

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In computing, FOSI (Formatting Output Specification Instance) is a stylesheet language for SGML and, later, XML. FOSI was developed by the US Department of Defense to control the pagination and layout of SGML and XML technical data. FOSI stylesheets are themselves written in SGML, an approach that would later be adopted by XSL. FOSI was implemented by, among others, Datalogics,[1][2] Arbortext[3][4] and X.Systems. FOSI is documented in the book Practical FOSI for Arbortext Editor (©2015) by Suzanne Napoleon.


  1. ^ Walsh, Norman (1999). DocBook: The Definitive Guide, Volume 1. O'Reilly Media, Inc. pp. 64–65. ISBN 9781565925809.
  2. ^ Von Hagen, William (1997). SGML for dummies. IDG Books Worldwide. p. 284.
  3. ^ Wood, John M. (1995). Desktop Magic: Electronic Publishing, Document Management, and Work Groups. Van Nostrand Reinhold. p. 91. ISBN 9780442017729.
  4. ^ Pawson, Dave (2002). XSL-FO: Making XML Look Good in Print. O'Reilly Media, Inc. p. 184. ISBN 9780596003555.