anchor.diff:  | <<in_predicate,IN Predicate>> | Determines if a sequence of values is equal to any of the sequences of
   values in a list of sequences.
   | <<like_predicate,LIKE Predicate>> | Searches for character strings that match a pattern.
  -| <<regexp_predicate,REGEXP Predicate>> | Searches for character strings that match a pattern, The pattern 
  -can be an extended regular expression.
  +| <<regexp_predicate,REGEXP Predicate>> | Searches for character strings that match an extended regular expression.
   | <<null_predicate,NULL Predicate>> | Determines whether all the values in a sequence of values are null.
   | <<quantified_comparison_predicates,Quantified Comparison Predicates>> +  
   (ALL, ANY, SOME ) | Compares the values of sequences of expressions to the values in each
  
positive.code: [[regexp_syntax]]
  ==== Syntax
  ```
  match-value [NOT] REGEXP pattern
  ```
  
  * `_match-value_`
  
negative.code: 
  * `_pattern_`
  +
  is a character value expression that specifies a regular expression. 
  Trafodion regular expressions follow POSIX regular expression rules.
  
  
  [[using_not]]
  