* Formats with lossless compression, such as FLAC, Monkey's Audio ( filename extension APE ), WavPack ( filename extension WV ), TTA, ATRAC Advanced Lossless, Apple Lossless ( filename extension m4a ), MPEG-4 SLS, MPEG-4 ALS, MPEG-4 DST, Windows Media Audio Lossless ( WMA Lossless ), and Shorten ( SHN ).

*. ccd, the filename extension for CloneCD's CD image file

The format of a file is defined by its content since a file is solely a container for data, although, on some platforms the format is usually indicated by its filename extension, specifying the rules for how the bytes must be organized and interpreted meaningfully.

Another popular convention is to use filename extensions ; for instance, if CGI scripts are consistently given the extension < tt >. cgi </ tt >, the web server can be configured to interpret all such files as CGI scripts.

*. dcm, filename extension for Digital Imaging and Communications in Medicine

The restrictions on filename length ( 8 characters plus 3 character extension for level 1 ) and directory depth ( 8 levels, including the root directory ) are a more serious limitation of the ISO 9660 file system.

Early versions used the filename extension " WKS ".< ref >

A MIME message including an attached file generally indicates the file's original name with the " Content-disposition :" header, so the type of file is indicated both by the MIME content-type and the ( usually OS-specific ) filename extension

Before 2007, the. ogg filename extension was used for all files whose content used the Ogg container format.

When an SVG image has been compressed with the industry standard gzip algorithm, it is referred to as an " SVGZ " image and uses the corresponding filename extension.

*. stm, a filename extension used by:

Some newer Ubisoft games use Vorbis files renamed with the filename extension. sb0.

Waveform Audio File Format ( WAVE, or more commonly known as WAV due to its filename extension ), ( also, but rarely, named, Audio for Windows ) is a Microsoft and IBM audio file format standard for storing an audio bitstream on PCs.

For example, all files having the extension. txt in a given directory may be searched if the shell supports globbing by using an asterisk as part of the filename:

* Systems such as Microsoft Windows which use filename extensions may use the extension "", e. g., "" or "".

*. rc, a filename extension for configuration files in UNIX-like environments, abbreviating " run commands "

Like all Unix shells, it supports filename wildcarding, piping, here documents, command substitution, variables and control structures for condition-testing and iteration .< ref >

for jpg in "$@" ; do # use $ jpg in place of each filename given, in turn

The Bourne shell, sh, was written by Stephen Bourne at AT & T as the original Unix command line interpreter ; it introduced the basic features common to all the Unix shells, including piping, here documents, command substitution, variables, control structures for condition-testing and looping and filename wildcarding.

However, " xsl " is used both as the conventional namespace prefix for the XSLT namespace, and as the conventional filename suffix for files containing XSLT stylesheet modules

Early versions of CP / M ( and other microcomputer operating systems ) implemented a " flat " file system on each disk drive, where a complete file reference consisted of a drive letter, a colon, a filename ( up to eight characters ) and a filetype ( three characters ); for instance.

*". cda ", a filename extension for a Compact Disc Audio track

RealAudio files were originally identified by a filename extension of. ra ( for Real Audio ).

The current algorithm for generating the unique filename combines the time, the host name, and a number of pseudo-random parameters to ensure uniqueness.

It is also used in modern Microsoft operating systems as an alternate filename to the long filename for compatibility with legacy programs.

To maintain backward-compatibility with legacy applications ( on DOS and Windows 3. 1 ), an 8. 3 filename is automatically generated for every LFN, through which the file can still be renamed, deleted or opened.

Where they differ is in the provision of support for long filenames, beyond the 8. 3 filename structure of the original FAT filesystem format, and in the provision of Unix file semantics that do not exist as standard in the FAT filesystem format such as file permissions.

# Beginning with Windows 2000, if at least 4 files or folders already exist with the same initial 6 characters in their short names, the stripped LFN is instead truncated to the first 2 letters of the basename ( or 1 if the basename has only 1 letter ), followed by 4 hexadecimal digits derived from an undocumented hash of the filename, followed by a tilde, followed by a single digit, followed by a period "< tt >.</ tt >", followed by the first 3 characters of the extension.

Bytecode is usually stored in files with the filename extension ". pbc ".

PASM code is usually stored in files with the filename extension ". pasm ".

PIR code is usually stored in files with the filename extension ". pir ".

The filesystem drivers can perform conversion for some files, attempting to auto-detect what files to convert based upon the extension portion of the filename, or globally for all files.

The standardized filename extension is. jp2 for ISO / IEC 15444-1 conforming files and. jpx for the extended part-2 specifications, published as ISO / IEC 15444-2.

Its document files used the RFT ( Revisable-Form Text ) or DCA ( document content architecture ) filename extension, both of which were standards on IBM mainframe computers.

File searches initiated by the user were keyword-based and matched against the filename list stored on the eDonkey2000 server, but the server returned a list of filenames paired with the hash values of those files to the client.

Also, filename extensions began to conflict between separate files.

Because there is no standard mapping between filename extensions and internet media types, mismatches in file type interpretation between authors, web servers, and client software can be a source of errors when transferring files over the internet.

The orchestra and score files may be unified into a single structured file using markup language tags ( a CSD file with filename extension. csd ).

Using a randomly generated filename is uninformative to the user, but changing the name breaks the loose database structure between files.

Executable files used the relocatable. CMD file format ( the same filename extension. CMD is used by Microsoft Windows for unrelated batch files ).

Monkey's Audio files use the filename extension < tt >. ape </ tt > for audio, and < tt >. apl </ tt > for track metadata.