This step extracts values from the input expression and tries to apply them to regular expressions in order to extract values to output columns. It works according to the following steps:

• The step evaluates the input expression and tries to "match" the result value with one of the defined regular expressions.
• Matching against regular expressions is done one by one in the same order as it is defined in the configuration. Matching stops when the first match is found.
• If a match is found, then the first possible match of the regular expression with the input value is evaluated and the divided data is sent to the predefined output columns. Format of the output data is given by the properties of the step.
• If no match is found, i.e., the value from the input column doesn't match the regular expression (the value can't correctly be divided into output columns), a scoring flag is set and processing of the current record is stopped

For information about regular expressions see the Regular expressions section on Expressions page.