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I have heard of it, and was tempted to grab a copy of the spec. -- The context in which I heard it, language design, Ada was put forth as the only language designed for both maintainability and correctness, someone responded that CHILL was another, but the only other they knew of.

https://psc.informatik.uni-jena.de/publ/1999-T-REC-Z.200-199...

https://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-Z.20...

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Both those links are the same, btw.

I can see why it's no longer used, with all those modes! But another language with ranges. Also has module inheritance.

>Both those links are the same, btw.

Yes, two different locations for freely getting the spec.

> I can see why it's no longer used, with all those modes! But another language with ranges. Also has module inheritance.

IIRC, "mode" used to mean (in some cases, historically, in CS) the equivalent of what we now call a "type" — I seem to recall Algol using the terminology, but may be misremembering.

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