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Delphi

 SDefinedTypeSyntax = 
  'deftype [<module-name>::]<symbol-name>'+sLineBreak+ 
  '     [<string-comment>] extends <type-name>'+sLineBreak+ 
  '     [ [<range-definition>]'+sLineBreak+ 
  '       [<unit-definition>]'+sLineBreak+ 
  '       [<cardinality-definition>]'+sLineBreak+ 
  '       [<allowed-definition>*]'+sLineBreak+ 
  '     ] |'+sLineBreak+ 
  '     [fuzzy-variable-definition]'+sLineBreak+ 
  ''+sLineBreak+ 
  '<type-name>   =  (type <ATOM| STRING| INTEGER| FACTID| FLOAT| DESCRIPTOR| OBJECT| CLASS| EXTERNALADDRESS>+|FUZZY)'+sLineBreak+ 
  '<range-definition> =  (range <min-float-expression> <max-float-expression>)'+sLineBreak+ 
  '<unit-definition>   =  (units <string-expression>)'+sLineBreak+ 
  '<cardinality-definition> =  (range <min-float> <max-float>)'+sLineBreak+ 
  '<allowed-definition> =  (allowed-values <expression>+)|'+sLineBreak+ 
  '         (allowed-numbers <numeric-expression>+)|'+sLineBreak+ 
  '         (allowed-integers <integer-expression>+)|'+sLineBreak+ 
  '         (allowed-floats <float-expression>+)|'+sLineBreak+ 
  '         (allowed-lexemes <string-or-symbol-expression>+)'+sLineBreak+ 
  '         (allowed-symbols <symbol-expression>+)|'+sLineBreak+ 
  '         (allowed-strings <string-expression>+)'+sLineBreak+ 
  '<fuzzy-variable-definition>=  (range <min-float-expression> <max-float-expression>) [(values <fuzzy-term-definition>+)]'+sLineBreak+ 
  '<fuzzy-term-definition> =  (term <symbol-name> [<fuzzy-singletons>]|'+sLineBreak+ 
  '      [(s <leftbound-numeric-expression> <rightbound-numeric-expression>)]|'+sLineBreak+ 
  '      [(z <leftbound-numeric-expression> <rightbound-numeric-expression>)]|'+sLineBreak+ 
  '      [(tri <leftbound-numeric-expression> <center-numeric-expression> <rightbound-numeric-expression>)]|'+sLineBreak+ 
  '      [(pi [ <center-numeric-expression> <range-numeric-expression> ] | [ <left-numeric-expression> <center-numeric-expression> <right-numeric-expression> ])]'+sLineBreak+ 
  '<fuzzy-singletons> = ((x0 y0)+)'+sLineBreak+ 
  '::     = Module separator.  Module name is optional.  If not specified, a rule belongs to the currently active module'; 
 

Reference

•IEClipsParser