A data processing system generates a mapping between entries in an index to determine an object represented by digital content of a network address. The system includes a network interface system that receives script data and a content title of digital content; a data retrieval interface that retrieves executable logic; a parsing engine that executes the executable logic to extract an identifier of an object; a search engine that searches an index to identify a first entry with indexed data representing a descriptor of the object for which the identifier is extracted; and a mapping engine that generates, in the index, a second entry with data representing the content title of the digital content and with data representing the identifier of the object that is referenced by the digital content accessible at the network address, and a mapping between the first entry and the second entry.