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SI units in railML 3.x [message #1689] Mon, 15 January 2018 11:07 Go to previous message
Vasco Paul Kolmorgen
Messages: 55
Registered: November 2004
Member
Dear all,

happy new year to all of you that I haven't met so far!

Following the railML 3.1 dissemination workshop we had last week in
Berlin, we restarted the discussion about using SI units in railML
whenever possible.

What does it mean:
SI units are defined as International System of Units [1] and their
original purpose was to harmonize usage of physical units in various
disciplines. For example, lengths are defined in metres, masses is
kilogram and electric currents in ampere.

railML shall follow this SI approach based on a "golden rule": SI units
shall be used everywhere except when common usage principles in the
railway sector ("state of the art") define it differently. One example
for such an exception: speeds are defined in km/h instead of m/s.

I would like you to name further exceptions by simply answering on this
post. For example: how about the track gauge? Have it in metres (SI) or
in mm (not SI)? The Trac ticket #317 [2] summarizes this issue.

[1] https://en.wikipedia.org/wiki/International_System_of_Units
[2] https://trac.railml.org/ticket/317

Thank you very much and best regards,
Vasco--
Vasco Paul Kolmorgen - Governance Coordinator
railML.org (Registry of Associations: VR 5750)
Phone railML.org: +49 351 47582911
Altplauen 19h; 01187 Dresden; Germany www.railML.org

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