1. One or more processor-accessible media comprising processor-executable instructions that, when executed, direct a device to perform actions comprising: ascertaining if a resource for a current job container has been previously downloaded in a shared resources container; and if the resource for the current job container has been previously downloaded, inserting a resource reference into the current job container, the resource reference pointing to the resource previously downloaded in the shared resources container; wherein the resource reference points to the resource in a manner that is independent of resource type.