1. A system for processing information about documents in a collection of linked documents, the system comprising: one or more processors; memory storing one or more programs for execution by the one or more processors; the one or more programs including a global state manager configured to access information extracted from the collection of linked documents and to output a sorted anchor map, the sorted anchor map comprising a plurality of anchor records, each anchor record comprising a respective target document identifier and a respective list of inbound links, the list of inbound links including source document identifiers; wherein the plurality of anchor records are ordered in the sorted anchor map based, at least in part, on their respective target document identifiers; and wherein, for at least one anchor record, a document located at a source document address corresponding to a source document identifier in the list of inbound links contains at least one outbound link, the at least one outbound link pointing to a corresponding target document address, the target document address corresponding to the respective target document identifier for the at least one anchor record.