A new package has been installed at tug.ctan.org and it should make its way to your favorite mirror in the next day or two.
Thanks again, Jim Hefferon
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The following information was provided by the package's contributor.
Name of contribution: SIstyle v1.0 Author's name: Danie Els Location on CTAN: /macros/latex/contrib/SIstyle Summary description: Package to typeset SI units, numbers and angles License type: lppl
Announcement text given by the package's contributor: - - ---------------------------------------------------------------------- The SIstyle package typeset SI units, numbers and angles according to the ISO requirements. Care is taken with font setup and requirements. The emphasis is on ease of use, but it is the user's responsibility to know the rules and how to use SI units.
e.g.: SI{1}{N}=SI{1}{kg.m/s^2}
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You can have a look at the package at http://tug.ctan.org/tex-archive//macros/latex/contrib/SIstyle although you may get a better network connection by visiting a mirror of CTAN that is near to you; see http://www.ctan.org/tex-archive/README.mirrors