ddis(5) [ultrix man page]

DDIS(5) 							File Formats Manual							   DDIS(5)

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 specifica-
       tions 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:

	      DDIF   Digital Document Interchange Format

	      DTIF   Digital Table Interchange Format

	      DOTS   Data 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 identi-
       fied by the command as a ddis/ddif file. The command includes the string ddis/ as a part of its output if a file belongs in the	DDIS  fam-
       ily.

See Also
       ctod(1), dtoc(1), DDIF(5), DOTS(5), DTIF(5), CDA(5)

																	   DDIS(5)

DDIF(5) 							File Formats Manual							   DDIF(5)

Name
       DDIF - Digital Document Interchange Format (DDIF) files

Description
       Digital	Document Interchange Format (DDIF) is a DDIS/ASN.1 encoding for the interchange of revisable compound documents with document pro-
       cessing systems.  DDIF is also a document output format, a storage format for user documents residing on a disk, and  a	compound  document
       format.

       The  purpose  of DDIF is to allow the creation of compound documents and also to serve as a standard intermediate format for the conversion
       of documents based on other formats.  For example, a simple ASCII text file can be converted to DDIF, and the DDIF file can  then  be  con-
       verted to PostScript.  A DDIF document can also be converted to ASCII.

       DDIF files are documents or portions of compound documents.  A DDIF document is considered a simple document if it consists of one file.  A
       DDIF document is considered a compound document if it consists of more than one file, the master of which must be a DDIF file.

       A DDIF file can contain storage addresses (for example, filename) of other files, which must be DDIF, ASCII text,  binary,  or  PostScript.
       References to DOTS files is not supported.

       Because	a  DDIF file can reference another DDIF file and the referenced DDIF file can reference other DDIF files, a DDIF document can con-
       sist of a tree of files.

       The following commands are used to manipulate DDIF files:

       cdoc		   Provides a set of converters to and from DDIF format.

       ctod		   Packs DDIF documents into DOTS syntax.  The user can choose to archive a DDIF document in  this  manner.   The  command
			   also copies DDIF files from one location to another.

       dtoc		   Copies DDIF files from one location to another.

       dxvdoc		   Enables  user to view DDIF documents. The command is used on workstations running ULTRIX UWS software.  The command can
			   also display imbedded graphics and image data that is encoded in the DDIF syntax.

       vdoc		   Enables user to view DDIF documents.  The command is for use on character-cell terminals.

       DDIF documents can be mailed to other users.

See Also
       cdoc(1), ctod(1), dtoc(1), vdoc(1), dxvdoc(1X), DOTS(5), DDIS(5)

																	   DDIF(5)