1. A system for transacting in electronic commerce comprising: a processor; a storage device coupled to the processor; and software means operative on the processor for: disambiguating ambiguated data based on a document type definition, wherein the disambiguating the ambiguated data includes: mapping portions of the ambiguated data to potential elements defined in the document type definition to generate a mapping file of the ambiguated data, wherein each mapping of a potential element defined in the document type definition to a portion of the ambiguated data is represented by a node in the mapping file; and generating more than one permutation of candidate paths from the mapping file of the ambiguated data, wherein each candidate path represents a possible path from one node, representing a mapping of one potential element to a portion of the ambiguated data in the mapping file to another node, representing a mapping of another potential element to the portion of the ambiguated data, in the mapping file.