This schema defines structures that may be used to manage QESTLab security, including the addition, modification and deletion of users and roles. Defines the top-level security element for the security XML. Indicates that the security elements contained within should be deleted from QESTLab. Indicates that the security elements contained within should be created in QESTLab or, if the elements already exist, their details should be updated. Indicates that the security elements contained within should be created in QESTLab. If the security elements already exist, no action will be taken. Indicates that the security elements contained within should be modified with the provided details. If the elements do not exist, no action is taken. A container for QESTLab Users. Defines a User in QESTLab. This is typically a QESTLab user, but does not have to be. The QESTLab login ID of the user. Always required as a unique identifier for the user. Maps Users to roles. Maps Users to laboratories and regions. Defines the top-level element for the security XML file.