Patent ID: 7831898

Claim:
A method for providing archived material comprising: receiving a query for the archived material from a requester, the archived material comprising material suitable for reproducing electronically stored in a data store, wherein the requester is associated with a set of characteristics; in response to receiving the query: retrieving a first instance of the archived material, the first instance of archived material satisfying the query, the first instance of archived material comprising a plurality of items including a non-substitutable item satisfying the query and at least one collateral item comprising a substitutable item, wherein the quantity of collateral items in the archived material can change over time; retrieving metadata relating to the at least one collateral item, wherein the metadata indicates a temporal relevancy of the at least one collateral item; identifying the at least one collateral item to be collateral based on its temporal relevancy to a date of the query; determining a replacement for the substitutable item by referring to a set of rules comprising at least one rule associated with the substitutable item or at least one rule associated with the archived material or at least one rule associated with the set of characteristics, wherein the set of rules determine at least one allowable replacement of an original collateral item by a replacement collateral item; selecting a second collateral item according to the set of rules; generating a second instance of the archived material comprising the non-substitutable item and the second collateral item, wherein the second collateral item replaces the substitutable item of the first instance; and providing the second instance of the archived material to the requester.