ddis.5

<B>Digital的Unix操作系统VAX 4.2源码</B>

.TH DDIS 5
.SH Name
DDIS \- Digital Data Interchange Syntax / ISO ASN.1 (DDIS/ASN.1) files
.SH Description
.NXR "DDIS"
.NXR "Digital Data Interchange Syntax"
.NXR "ISO ASN.1 (DDIS/ASN.1) files"
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.
.PP
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:
.RS 
.IP DDIF 7
Digital Document Interchange Format
.IP DTIF
Digital Table Interchange Format
.IP DOTS
Data Object Transport Syntax
.RE
.PP
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
.MS file 1
command as a ddis/ddif file. The
.PN file
command includes the string ddis/ as a part of its output if a
file belongs in the DDIS family.
.PP
.SH See Also
ctod(1), dtoc(1), DDIF(5), DOTS(5), DTIF(5), CDA(5)