The Classic Mac OS used type codes and creator codes to associate each file with its corresponding application, regardless of file extension. For example, the MIME type text/plain would be associated with a text editor.
Linux-based GUIs, such as KDE and GNOME, support MIME type-based associations. The ability to configure advanced file association functionality, however, was removed in Windows Vista and later operating systems. Advanced features of Microsoft Windows file associations included manually defining a new file extension with any number of associated actions, a primary default action, showing extensions only for specific file types, customizing the file type icon and description and customizing associated MIME type and their handling (how to handle file types for files downloaded or directly opened from within the Internet Explorer browser). The Windows shell invokes file association actions through COM, drag and drop, command line calls or through Dynamic Data Exchange.
Older versions supported open associations stored in WIN.INI.įile associations can be displayed and edited using the assoc command and with the help of the ftype command it is possible to create association between file type and application which will open files of this type. Associations are stored in registry as sets of verbs for each file extension.
#Mac file extensions association series#
The Microsoft Windows series of operating systems, beginning with Windows 3.x supports file extension-based associations. An example for this is the Open With option in the Windows Shell. A mechanism for modifying associations is also usually present. The "open" verb invokes the associated application program, which reads the file or document and presents it to the user for viewing, and possibly for editing or other action.Īdditional actions such as print are usually accessed via a right-click context menu. For example, opening a file from a file manager usually invokes the open verb in order to open the file with its associated application. Most operating systems support file associations in some form or the other. Some of the common verbs are:Ī picture, for example, may be associated with these words so that open opens the picture in an image viewer, edit opens up an image editing program and print sends the picture to a printer. A single file extension may have several associations for performing various actions, also known as verbs.
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