ISO Working Group 9
The ISO Working Group 9 (ISO-IEC/JTC1/SC22/WG9)
deals with the programming language Ada and related standards within
the International Organization for Standardization.
WG9 holds regular meetings, often in conjunction with major Ada conferences.
WG9 has several rapporteur groups.
- ARG: Ada Rapporteur Group
Evaluation of comments on the Ada standard
This is the group responsible for evaluating comments on the Ada
standard. Officially, the group is only developing a technical
report addressing comments and questions concerning the ISO
standard for Ada. (Arcane ISO rules prevent the ARG or WG9 from
issuing "official" interpretations of a standard.) In practice,
when a response to a comment is approved by WG9, the response is
taken into account by the Ada Validation Office and affects the
test suite. The documents containing comments on the standard
and ARG responses are called "Ada Commentaries" and are given
numbers of the form AI-ddddd/vv, where vv is a version number.
Comments and questions about the Ada standard
should be sent to
using the format specified in the Ada standard.
Commentaries are regularly updated. The text of all commentaries is
available by anonymous FTP from the
AdaIC site in directory public/AdaIC/standards/95com.
You can receive e-mail notification of an update to a commentary
(optionally including the text of the commentary) by sending a request
A detailed discussion --dating back to Ada 83 days-- of ARG procedures
can be found
in directory public/AdaIC/standards/83com, in file arg-procedures.doc.
A reformatted copy of the Ada 83 Reference Manual that documented
WG9-approved commentaries was published by Karl Nyberg (firstname.lastname@example.org).
- CRG: Character Rapporteur Group
- International Character Sets
- IRG: Information Systems Rapporteur Group
- Decimal Arithmetic
- NRG: Numerics Rapporteur Group
- NUMWG packages
- RRG: Real-Time Rapporteur Group
- SRG: SQL Interfaces Rapporteur Group
- URG: Uniformity Rapporteur Group
Evaluation of Uniformity Issues (UIs)
Responsible for evaluating Uniformity Issues (UIs). UIs
specify/recommend specific choices for the compiler implementor,
where the language permits implementation freedom. The
"canonical example" is UI-8, on integer types. This UI
recommends that integers be at least 32 bits, and provides names
for the other predefined integer types. The goal of the URG and
the UI's is to further Ada portability by providing uniform
implementations of implementation-dependent features commonly
used by Ada applications.
- XRG: Ada 9X Rapporteur Group
Page last modified: 1998-12-20