 | These web pages are a source of information for users on what's new inthe Single UNIX Specification, Version 2 : Articles submitted to Usenix ;LoginOther ArticlesBackground Information The Single UNIX Specification, Version 2 aligns with the following: - Alignment with the latest international standards:
- ISO/IEC 9945-1:1996 which incorporates ANSI/IEEE Std POSIX 1003.1-1990, 1003.1b-1993, 1003.1c-1995 and 1003.1i-1995 [1003.1b-1993 and 1003.1i-1995 are Realtime extensions . 1003.1c-1995 is Threads extensions.]
The Realtime extensions are an optional feature group, allowing procurement of X/Open realtime systems with predictable , bounded behaviour. The Threads extensions permit development of applications to make significant performance gains on multiprocessor hardware. - ISO C Amendment 1: 1995 (Multibyte support)
This further enhances X/Open's internationalised applications support.
- Large File Summit extensions to permit UNIX systems to support files of arbitrary sizes, this is of particular relevance to database applications.
- Extended Threads functions over POSIX threads, based on industry input from Sun, Digital, HP and DCE.
- Dynamic linking extensions to permit applications to share common code across many applications, and ease maintenance of bug fixes and performance enhancements for applications.
- N-bit cleanup (64 bit and beyond) , to remove any architectural dependencies in the UNIX specification. This is of particular relevance with the ongoing move to 64 bit CPUs.
- Year 2000 Alignment to minimise the impact of the millennium rollover.
- An optionalSoftware Administration component for packaging software.
The Open Group has also introduced new test suites in support of the Single UNIX Specification, Version 2. |
