gz indicates that the tar archive file is compressed with gzip). tar indicates that the file is a tar archive of one or more files, and the. More than one extension usually represents nested transformations, such as (the. A file name can have no extensions, a single extension, or more than one extension. The dot character is just another character in the main filename. In OS/360 and successors, the part of the dataset name following the last period is treated as an extension by some software, e.g., TSO EDIT, but it has no special significance to the operating system itself the same applies to Unix files in MVS.įilesystems for UNIX-like operating systems do not separate the extension metadata from the rest of the file name. Under Microsoft's DOS and Windows, extensions such as EXE, COM or BAT indicate that a file is a program executable. On file systems of some mainframe systems such as CMS in VM, VMS, and of PC systems such as CP/M and derivative systems such as MS-DOS, the extension is a separate namespace from the filename.
The exact definition, giving the criteria for deciding what part of the file name is its extension, belongs to the rules of the specific filesystem used usually the extension is the substring which follows the last occurrence, if any, of the dot character ( example: txt is the extension of the filename readme.txt, and html the extension of ). They are commonly used to imply information about the way data might be stored in the file. Request for additional time to file an income tax return beyond the due date.Filename extensions may be considered a type of metadata. An option for renewal implies giving a new lease on the same terms as those of an old lease, while an option for extension contemplates a Continuance of an old lease for a further period. The distinction between extension and renewal of lease is chiefly that, in the case of renewal, a new lease is requisite, while, in the case of extension, the same lease continues in force during an additional period upon performance of a stipulated act. The word extension, when used in its proper and usual sense in connection with a lease, means a prolongation of the previous leasehold estate. A creditor's indulgence by giving a debtor further time to pay an existing debt. An agreement between a debtor and his or her creditors, by which they allow the debtor further time for the payment of liabilities. Addition to existing facilities.Īn allowance of additional time for the payment of debts. An increase in the length of time specified in a contract.Ī part constituting an addition or enlargement, as in an annex to a building or an extension to a house.
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