Methods and systems are provided for converting text to XML code. A schema is applied to the text. The schema is a XML-compliant template that incorporates a single enhanced regular expression. One enhancement causes the matched text to be concatenated and displayed. The concatenated matched text is merged with the template to generate a markup language-compliant output. The enhanced regular expression can include a grouping operator that is nestable within another regular expression operator, for example the “*” operator that matches zero or more instances of its operand. Special purpose tags may be defined in the schema to represent regular expression operators.