# Filetypes

The lister displays all available filetypes. Worker supports hierarchical filetypes, so every filetype can have any number of subtypes. This can be used to group several similar filetypes. For example, there can be an image type, which does not contains any filetype description but only a default action for showing images. Each real image type can be a child filetype so it can be used to describe the actual filetype but does not need to add a action to show this image type if the default program can be used for this type.

Subtypes will be checked if the filetype tests of parent type matches the current file or the parent type does not use any tests. The action of the parent type is used if the action list of the type is empty or the "parent action" command is used. The "no operation" command can be used to not execute the commands of the parent type.

1. Creates new filetype without a parent filetype and edit it.
2. As before but the new type will be a child of the filetype currently selected
3. Copy the selected filetype. The copy will be inserted at the same position.
4. Edit the selected filetype.
5. The selected filetype will be deleted (with all its subtypes).
6. The selected filetype will be removed from the list and stored in the clipboard.
7. The filetype in the clipboard will be inserted into the list as a root filetype.
8. The filetype in the clipboard will be inserted as a childtype for the filetype currently selected.
9. This button opens a window to enter a list of directories. The filetype recognition will not read the content of files in this directories.

There are 4 special filetypes, which cannot be removed and do not have parent types. It is possible to configure these types but the pattern/filecontent will not be used for filetype recognition.

1. Directory
   This type describes directories.
2. Not yet checked
   Is used for files that were not checked for their type yet.
3. Unknown filetype
   Is used for every not recognized filetype.
4. NoSelect-Type
   Is used for filetype depending actions if no file is selected.

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