Techniques are provided for sending, to an owner of a document, proposed modification data for the document. The proposed modification data comprises one or more modification proposals suggested for a particular portion of the document. In response to receiving, from the owner, an approval message for a first modification proposal, from the one or more modification proposals, a modified document is generated by modifying, using the first modification proposal, the particular portion of the document. The modified document is stored as a new version of the document. History data is generated by including the first modification proposal in the history data as an implemented modification; and, in response to determining that the one or more modification proposals comprise one or more modifications other than the first modification proposal, including the one or more modifications in the history data as non-implemented modifications.