Patent ID: 8364667

Claim:
A method comprising: obtaining a plurality of web pages with the same or approximately the same content; determining, using one or more computer processors, a plurality of generation times, and a plurality of first evaluation values that correspond to a plurality of first ranks of the respective ones of the plurality of web pages; wherein: for one of the plurality of web pages, its corresponding generation time includes: a time at which content of the one of the plurality of web pages was published, a time at which content of the one of the plurality of web pages was released, a time at which the one of the plurality of web pages was crawled, or a time that was mentioned by the content of the one of the plurality of web pages; identifying an earliest web page among the plurality of web pages that has the earliest generation time; and determining a second evaluation value of the identified earliest web page based at least in part on the plurality of first evaluation values; wherein: the second evaluation value is used to indicate a copy rank of the identified earliest web page among the plurality of web pages.