The "Version History" screen shows the versions of Invantive Estate that were installed over time. A version is a modification of the software or a new delivery of the configuration settings. Versions cannot be changed or removed. The software of Invantive registers each version. The fields have the following meaning: - "Version ID": The ID number of the installation. - "Version": The version number under which the supplier knows this version. - "Module": The module that has been replaced. The value is "All" when large parts of the application are replaced. - "Installation Date": The moment at which the installation finished. - "Comments": Optional remarks about the installation of the software. - "Object Versions": The version information of the database objects (packages and procedures). - "Database Context": The variables that define the database context. These variables serve, for example, to debug time travelling over project versions. - "Database NLS Parameters": The database NLS parameters determine the local behaviour in the database runtime environment on the client and the server. NLS selects a specific language and stores the data in a specific character set. NLS is part of the overall support of the database. It allows multilingual applications and software that users access and run simultaneously from all parts of the world. - "Database Parameters": The parameters that initialise and configure the database. - "Other Database Parameters": The settings that are not in the database configuration file. - "Environment Variables": The set of variables that define the environment in which the software runs on the web server. - "Java System Variables": The Java system variables on the web server.