Tags: Programming Language.
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 Arbortext and X.Systems.