Abstract: Content from multiple data sources may be coordinated. A native file may be received at a first client computer from an auxiliary data store. The native file may include metadata such as a document title. The first client computer may then send a reserve title request to a primary data store. The reservation request may include the document title of the native file. The first client computer may then receive a response granting the reserve title request from the primary data store. The response may indicate that the native file is locked from further editing by another client computer. The first client computer may then convert the native file from a proprietary file format to a global file format and send the converted native file to the primary data store.