14. The data processing system according to claim 13 , wherein said grouping operator is nestable within another regular expression operator.
13. A data processing system for converting text to code that is compliant with a markup language, comprising: a memory accessible having a schema stored therein, wherein said schema comprises a regular expression having printer tokens embedded therein and having sections, each of said sections being delimited by a grouping operator, wherein said schema comprises special purpose tags that are compliant with said markup language, said special purpose tags respectively encoding regular expression operators, wherein applying said schema comprises applying said encoded regular expression operators to said text for matching thereof; a processor operative to: receive said text as input; apply said schema to said text to identify portions of said text that match each of said sections; and for each of said sections concatenate said printer tokens and respective identified portions of said text to generate an output that is compliant with said markup language, printer tokens each for generating a constant string.