NIST unit rules and conventions

Paul Theodoropoulos paul at
Wed Sep 19 19:55:41 UTC 2018

NIST has a page of guidelines for formatting units in documents -

I am conforming unit presentation within the various documents I'm 
editing to use the guidelines, mostly #15:

    There is a space between the numerical value and unit symbol, even
    when the value is used in an adjectival sense, except in the case of
    superscript units for plane angle.

    proper:     a 25 kg sphere
                 an angle of 2° 3'  4"
                 If the spelled-out name of a unit is used, the normal
    rules of English apply: "a roll of 35-millimeter film."

    improper:   a 25-kg sphere
                 an angle of 2 ° 3 ' 4 "

So for example, where there are instances of 50ppm, 8-ms, I'm updating 
them to 50 ppm, 8 ms.

Uniformity of presentation seems like a desireable goal - are there any 
objections to following these particular guidelines?

There's a handful of other conventions codified that may turn up needing 
conformance, which I'll also conform where I find them - where reasonable.

Paul Theodoropoulos

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