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The name of the ZIP archive file must only contain the plugin some name, for example: linkchecker.zip. This name is not relevant for your folder name at plugin directory.
plugin.xml
Each plugin must have a XML file which contains metadata for the plugin itself and for the installation in the system. Among other things this file is responsible for the folder name in the plugins directory of CONTENIDO. Most important it contains all relevant entries for some special database tables, so the plugin is accessible in the backend (creating menu entries and so on). These tables are: actions, area, files, frame_files and nav_sub.
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