1. A computer-implemented method, comprising: receiving an image of a label of an item; performing optical character recognition on said received image such that one or more strings of characters are determined from said received image; determining a particular type of information indicated by said received image from among a plurality of different types of information, wherein a different respective set of one or more patterns of characters is designated for each different one of the plurality of different types of information; based at least in part on said particular type of information, selecting a particular set of one or more patterns of characters designated for said particular type of information indicated by said received image, wherein a particular pattern of the one or more patterns of characters of said particular set is a pattern for locating a value for an attribute in the one or more strings of characters determined from said received image, wherein the value is not currently provided in structured data for the item; determining that said particular pattern of characters of said particular set matches a particular string of said one or more strings of characters determined from said received image, wherein the particular pattern of characters indicates the attribute of the item whose value is not currently provided in the structured data for the item; extracting information from said particular string as the value for the attribute of said item; storing the value for the attribute from said extracting in the structured data for the item; and in response to a request subsequent to said storing, generating at least part of a network-based page associated with said item, wherein said generating comprises populating said network-based page with information from the structured data for the item, the information from the structured data including the value that was obtained from said extracting information from said particular string determined from said received image.