2.2.11 Shared Workbooks
The shared workbook infrastructure is used to enable multiple users to make changes to a workbook at the same time as well as track changes that certain users make. A shared workbook contains a collection of users that currently have the document open and a set of revision logs (section 2.2.11.2) that contain the changes that users have made to the workbook. Each of these logs has a corresponding revision header associated with it and contains either a set of revision records (section 2.2.11.3) that have been made to the shared workbook because it has been shared or no revision records (section 2.2.11.3). A workbook is a shared workbook if and only if the user names stream (section 2.1.7.17) exists.
Figure 17: Structure of shared workbooks
The following sections define terms used in this diagram.