Abstract: An editing system is provided, the system comprising a control file store for storing control file data; a control file manager capable of selectively obtaining content data from a data resource in response to a search term input by a user, generating control file data on the basis of the obtained content data and storing the control file data in the control file store; a document verifier capable of receiving document data forming part of a document edited by a user and outputting a control signal based on the document data and part or all of the control file data; and a document controller capable of receiving control signals from the document verifier and performing a predetermined action at least in response to receiving a rejection control signal. The system provides control over the content of a document edited by a user.