1. A method comprising: storing a plurality of parser definitions, wherein each parser definition is associated with an object type, wherein a particular parser definition of the one or more parser definitions comprises two or more parser sub-definitions, wherein a first parser sub-definition of the two or more parser sub-definitions is associated with a first property type, and wherein a second parser sub-definition of the two or more parser sub-definitions is associated with a second property type, wherein at least the first property type is a composite type that includes two or more of a string component, a date component, or a number component, by: displaying, on a computer display device using a user interface screen display, a text box that can receive a user entry of regular expression pattern text; creating and storing a plurality of property type component mappings that associate sub-definitions of the regular expression pattern text with property type components by selecting from a combo box in the user interface screen display, wherein the two or more parser sub-definitions comprise the sub-definitions of the regular expression pattern text; determining whether input data matches the particular parser definition; based at least in part on determining that the input data matches the particular parser definition: creating at least a first property instance of the first property type and a second property instance of the second property type; storing first data corresponding to a first portion of the input data in the first property instance, wherein the first portion of the input data and the corresponding first data each include two or more of string data, date data, or number data; storing second data based on a second portion of the input data in the second property instance; wherein the method is performed by one or more computing devices.