An online document system can allow users to upload a document packages containing multiple individual document files. The online document system then automatically identifies and separates the component documents within an uploaded document package based on a package template for that type of document package. Based on the documents included in the document package, the online document system can automatically take action on the identified documents. The online document system may recognize component documents within a document package using a set of rules defining potential component documents that may appear within the received document package and one or more methods of recognizing each type of component document. In some embodiments, the online document system can improve package templates and recognition of component documents over time using feedback from the importing users through updates to the document identification rules and/or a supplementary probabilistic recognition system.