anchor.diff:    ;
   //[62]
   SchemaAttributeTest
  -  : 'schema-attribute' '(' AttributeDeclaration ')'
  +  : SCHEMA_ATTRIBUTE '(' AttributeDeclaration ')'
     ;
   //[63]
   AttributeDeclaration
  
positive.code:   ;
  //[11]
  RangeExpr
    : AdditiveExpr ( 'to' AdditiveExpr )?
    ;
  //[12]
  AdditiveExpr
  
negative.code:   ;
  //[4]
  ForExpr
    : SimpleForClause RETURN ExprSingle
    ;
  //[5]
  SimpleForClause
    : FOR '$' VarName IN ExprSingle (',' '$' VarName IN ExprSingle)*
    ;
  //[6]
  QuantifiedExpr
    : (SOME | EVERY) '$' VarName IN ExprSingle (',' '$' VarName IN ExprSingle)* SATISFIES ExprSingle
    ;
  //[7]
  IfExpr
    : IF '(' Expr ')' THEN ExprSingle ELSE ExprSingle
    ;
  //[8]
  OrExpr
    : AndExpr ( OR AndExpr )*
    ;
  //[9]
  AndExpr
    : ComparisonExpr ( AND ComparisonExpr )*
    ;
  //[10]
  ComparisonExpr
  