III.B. File Encoding Metadata (Repeatable for each file)
Identifies the encoding pertinent to the individual files that comprise the record.

III.B.1.File-Modality [Mandatory]
Identifies the file modality (i.e. text, numeric, graphic, geographic, image, sound, video, multimedia etc.).

III.B.2.File-Data-Representation [Mandatory]
Identifies the data encoding standards used by the file (i.e., ASCII, EBCDIC, or UNICODE character data, ASN.1, CCITT Group III raster, etc.)

III.B.3.Data-Codes [Mandatory if non-standard methods of representation are used]
Indicates specifically how the data is encoded when registered methods are not being used. For example, for vector data whether it is topological, spaghetti, chain-node, etc., for raster data the number of dots per inch and their bit density, for sampled data the number of samples per second, etc.

III.B.4.Compression-Method [Mandatory]
Identifies the method of compression, if any, that was used (ex: None, JPEG, MPEG, Quicktime, LZW, etc.). If the method complies to a specific standard, this may consist of only the identification of that standard (name, version, etc.), otherwise the method may need to be defined in technical detail.