From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.3 required=5.0 tests=BAYES_00,INVALID_MSGID autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,c9264a5c1761f446 X-Google-Attributes: gid103376,public From: Markus Kuhn Subject: Re: Mission Critical Definition and Compliance Date: 1998/01/29 Message-ID: <34D11554.3FBEA8D9@cl.cam.ac.uk>#1/1 X-Deja-AN: 320414912 Content-Transfer-Encoding: 7bit References: <34D0F22A.41C67EA6@swl.msd.ray.com> Content-Type: text/plain; charset=us-ascii Organization: Cambridge University, Computer Laboratory Mime-Version: 1.0 Newsgroups: comp.lang.ada Date: 1998-01-29T00:00:00+00:00 List-Id: John J. Cupak Jr. wrote: > I have been asked to locate the *official* definition of "Mission > Critical" software, together with the process for defining which > language comply with it. > > I "know" that Ada is a Mission Critical (approved) language, but Java > and C++ are not. Why? Who decides? Where is this published? IEC 1508 recommends the use of a safe subset of Ada for SIL4 components. SPARK is probably the language of choice for the design of such systems. C is only allowed for SIL1 and SIL2 components, C++ is not at all recommended for any safety critical software. http://www.mod1ndrl.demon.co.uk/SSP84/Chapter9.html http://www.mod1ndrl.demon.co.uk/SSP83/Chapter9.html Don't know about Java, but the JavaSoft License conditions prohibited the use of Java in any safety critical applications the last time I saw them. Markus -- Markus G. Kuhn, Security Group, Computer Lab, Cambridge University, UK email: mkuhn at acm.org, home page: