Design rule for Camera File system
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Design rule for Camera File system (DCF) is an JEITA specification, (Number CP-3461) which defines a File format and file system for digital cameras, including the directory structure, file naming method, character set, file format, and metadata format. It is currently the de facto industry standard for digital still cameras. The file format of DCF is based on the Exif 2.2 specification.
The latest version of the standard is v 2.21.
The root directory in a digital camera contains a DCIM (Digital Camera Images) directory which contains possibily multiple subdirectories with names such as "123ABCDE", and no two directories may have the same three digit code. The alphabet characters often refer to a camera maker. Each image has a name such as "ABCD1234" for image number 1234.