A system and method are provided for identifying and extracting a subset of data from a selected web page of a web site for display on a client machine. One or more instructions are applied to the selected web page for identifying and displaying a candidate subset of data on the client machine (i.e. a wireless mobile device). The instructions are applied in accordance with one or more pre-defined criteria defining one or more types of the subset of data, and one or more pre-defined confidence intervals defining a pattern for locating the subset of data in accordance with said one or more types on the selected web page. An interface may further be provided to allow the amendment or confirmation of the candidate subset of data.