By module content the set of files in the distributive is meant which implement various functionality of the module. The module uploaded in Plesk must include: scripts implementing control over installation, configuration, removal, and also module management processes, and files containing module functionality itself. 

Thus, the module distributive is an RPM or a self-extracting shell script, consisting of the following parts: 

• PHP scripts, implementing a module management;
• C utilities, implementing a module management;
• additional files, such as icons, help files, etc.;
• the files of the module itself (a functional part itself);
• installation and uninstallation scripts.