NAME

DDIS − Digital Data Interchange Syntax / ISO ASN.1 (DDIS/ASN.1) files

DESCRIPTION

DDIS/ASN.1 files conform to Digital’s Digital Data Interchange Syntax.  DDIS conforms to syntaxes that can be defined within the specifications of International Standards Organization Abstract Syntax Notation One (ISO ASN.1), but is not itself an implementation of full ISO ASN.1 syntax. 

DDIS/ASN.1 files conform to the DDIS/ASN.1 syntax.  The DDIS/ASN.1 syntax is itself used to define other syntaxes.  The following are among the syntaxes that are subsets of DDIS/ASN.1:

DDIFDigital Document Interchange Format

DDFFDigital Document Final Form

DOTSData Object Transport Syntax

Files that conform to one of the DDIS/ASN.1 family of syntaxes are described as DDIS/ASN.1 files.  More specifically, however, the files are typed according to a particular DDIS/ASN.1 syntax.  For example, a file that conforms to the DDIF syntax is a DDIF file, and is identified by the file() command as a ddis/ddif file. The file command includes the string ddis/ as a part of its output if a file belongs in the DDIS family.

SEE ALSO

ctod(1), dtoc(1), DDIF(5), DOTS(5)

File Formats