We are members of the Ecma/ISO Standards committees for the Common Language Runtime and the C# Programming Language. In 2004, Dr Nigel Perry from New Zealand accepted convenorship of the C# committee.

Ecma/ISO C# and Common Language Infrastructure Standards

In June 2005, the General Assembly of the international standardization organization Ecma approved edition 3 of the C# Language and the Common Language Infrastructure (CLI) specifications, as updated Ecma-334 and Ecma-335, respectively (see press release). The updated technical report on the CLI, Ecma TR-84, and a new technical report on the CLI, Ecma TR-89, were also ratified.

In July 2005, Ecma submitted the Standards and TRs to ISO/IEC JTC 1 via the ISO Fast-Track process. The Standards were adopted in April 2006 as ISO/IEC 23270:2006 (C#), ISO/IEC 23270:2006 (CLI), ISO/IEC TR 23272:2006 (CLI, XML Libraries) and ISO ISO/IEC TR 25438:2006 (CLI, Common Generics).

In July 2006 the General Assembly of Ecma approved edition 4 of the Standards which correspond to the ISO 2006 versions.

The Ecma 4^th and ISO 2^nd Editions

Aside from bug fixes, major enhancements from previous editions include:

CLI

• First-class support for generics at the runtime and class library level
• An API to help developers begin multithreaded and parallel programming
• Enhancements to the Common Intermediate Language (CIL) and Common Language Specification (CLS)
• An interchangeable debug format

C#

• First-class language support for generics
• Anonymous methods
• Iterators
• Nullable Types

Previous Editions Background

In August, 2000, Microsoft Corporation, Hewlett-Packard and Intel Corporation co-sponsored the submission of specifications for the Common Language Infrastructure (CLI) and C# programming language to the international standardization organization Ecma. As a result, Ecma formed two task groups (TG3 and TG2, respectively) within TC39, its technical committee responsible for programming languages and application development.

During the next year, the co-sponsor companies, in conjunction with other Ecma members and guests (including IBM, Fujitsu Software, Plum Hall, Monash University and ISE), refined these specifications into standards. In December, 2001, the Ecma General Assembly ratified the 1^st edition of the C# and CLI standards as Ecma-334 and Ecma-335, respectively. A technical report on the CLI, Ecma TR-84, was also ratified.

In late December, 2001, Ecma submitted the standards and TR to ISO/IEC JTC 1 via the latter's Fast-Track process. The subsequent 6-month evaluation and comment period resulted in two NO votes (Japan and UK) on the draft standards, and one NO vote (Japan) on the draft TR. All comments resulting from this review were considered at a ballot resolution meeting held in October, 2002. The two NO votes on the standards were resolved, making acceptance unanimous. However, Japan did not change its NO vote on the draft TR (Japan would like to see a formatted/readable rendering of the CLI class library as part of the standard, not as a TR; this will be considered for a future edition).

The ISO/IEC standards and TR were published in April, 2003, and are known formally as ISO/IEC 23270 (C#), ISO/IEC 23271 (CLI) and ISO/IEC 23272 (CLI TR). Equivalent specifications were adopted as 2^nd edition standards and TR by Ecma at its December, 2002, General Assembly.

Joining Ecma

To participate in the standardization process, contact your organization’s Ecma representative (New Zealanders, see below). If your company does not currently participate in Ecma and wishes to do so, please contact Ecma directly.

Acknowledgements

The following organizations have participated in the work of Ecma TC39/TG2 and TC39/TG3 and their contributions are gratefully acknowledged: Borland, Fujitsu, Hewlett-Packard, Intel Corporation, International Business Machines, ISE, IT University Copenhagen, JSL (UK), Kahu Research (New Zealand), Microsoft Corporation, Monash University, Netscape, Novell Corporation, OpenWave, Plum Hall, Sun Microsystems.

Many of the organizations that have participated in the TC39/TG2 and TC39/TG3 work have volunteered to mirror this site. The links for the mirror sites are:

• Intel Corporation
• ISE (Eiffel)
• IT University, Copenhagen
• Kahu Research, New Zealand
• Microsoft Corporation
• Novell (Mono)

Ecma Common Generics

We are the source site for the reference implementation of: ECMA TR/89 Common Language Infrastructure (CLI) Technical Report: Common Generics, 2^nd Edition, July 2006.

Two downloads are available:

Feedback on this library is encouraged. Please email ecmacli AT zoot DOT net DOT nz.

For New Zealanders

If you are in New Zealand and have any questions on the Standards process you may if you wish email Dr Nigel Perry, who is the convenor of the Ecma C# committee.