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ASN.1:1997 as the notation for SMIng
Attached please find an output from the ITU-T SG7 meeting (re: ASN.1) for
your information. Unfortunately, the dates mentioned in the communication
have already passed. The next meeting on ASN.1 is next week, following that
on November 5-16 in Paris. The next SG17 meeting is Feb. 27-March 8, 2002.
Please note that SG7 and SG10 have merged to SG17.
Please further note that most ITU-T language Recommendations are now
available as PDF files without any restriction whatsoever for downloading
and distribution under the following address:
This is not a general policy for all ITU-T Recommendations, but only applies
to the selection of SG17 Recommendations, the A-Series Recommendations and
two other Recommendations (which I cannot recall).
For all others, the general policy is to get a free download for 3
Recommendations per year per email address.
ITU - Telecommunication Standardization Sector Temporary Document 2098
STUDY GROUP 7
Bangalore, 28 August – 7 September 2001
SOURCE: ITU-T Study Group 7
TITLE: ASN.1:1997 as the notation for SMIng
TO: IETF / SMIng working group
APPROVAL: ITU-T Study Group 7
CONTACT: Olivier Dubuisson Tel: +33 2 96 05 38 50
Fax: +33 2 96 05 39 45
ITU-T SG 7 Q.9/7 has carefully studied the requirements for the notation to
be used to specify SMIng and concludes that it has an available notation
that in our understanding fully meets those requirements (even the optional
ones). This is a mature notation which is well supported by a number of
commercial and public domain tools.
Q.9/7 experts plan to attend the next IETF meeting to be held in Salt Lake
City, 9-14 December 2001. We also invite discussion at any upcoming meeting
of Q.9/7 (Q.12/17 from September 17 onwards), and will present the notation
and discuss with the SMIng group any modifications that may result from open
issues that could not directly be identified from the requirements document.
ITU-T sees many advantages in the use of an existing and mature notation,
both technically and from the point of view of extending ITU-T and IETF
The primary specification of the notation and its semantics would be by
using the Information Object Class notation and its WITH SYNTAX clause from
the 1997 edition of ASN.1 (now available free on the web, see
http://asn1.elibel/tm.fr/standards). This primary definition can be readily
mapped to an ABNF specification of the syntax, which could be included as an
Annex to the SMIng RFC.
The SMIng group will recognize that the Information Object Class notation
was introduced in 1994 to replace the ASN.1 Macro notation (which was found
to have many flaws) and has many similarities with that notation. Thus it
will be familiar to those who know the existing SMI.