1. A system for caching previously identified electronic document resources, the system comprising: a computer-readable medium comprising: a resource database comprising a resource record operative to identify an electronic document resource, wherein the resource record comprises a resource record identifier and resource record content; and a processor operative to: transmit a first request for an electronic document; receive a first response comprising the electronic document; parse the electronic document to identify an electronic document resource that has been tagged with a cache identifier, wherein the cache identifier is operative to identify that the electronic document resource is to be cached in the computer-readable medium; and cache the electronic document resource in the resource database as the resource record, wherein: the resource record content comprises the electronic document resource; and the resource record identifier comprises the cache identifier.