ImageGear for C and C++ on Windows v19.1 - Updated
Multipliers
User Guide > How to Work with... > OCR > Technical Specifications > Regular Expressions > Anatomy of a Regular Expression > Multipliers

The real strength of regular expressions comes from multipliers. They can be used to repeatedly apply an atom - or a parenthesized sub-expression - to a target field. Multipliers have one of the following forms (n and m denote integer values in the descriptions):