1. A method for implementing a workflow comprised of nodes, comprising: generating a workflow packet accessed by users at the nodes in the workflow; receiving a request to add one target object in one of a plurality of data stores to the workflow packet, wherein each data store includes multiple objects; determining a first object identifier of the target object that is used to identify the target object in one data store; generating a second object identifier indicating the data store including the target object and the first object identifier; and inserting the generated second object identifier into the workflow packet, where nodes accessing objects in the workflow packet use the second object identifier to access the target object for use at the node.