Semantics : SgmlHandlerDeclaration

SgmlHandlerDeclaration  ::=  ( sgml ( case )? | html ) IDENTIFIER ( extends IDENTIFIER )?
{ ( SgmlEvent : ( Statement )+ )+ }

Used by:  

This declares a SGML handler statement that can be later invoked via a SgmlStatement, or to be inherited by other SGML handler statements. See SgmlStatement for details.