OpenMath Content Dictionary: units_time1

Canonical URL:
http://www.openmath.org/cd/units_time1.ocd
CD File:
units_time1.ocd
CD as XML Encoded OpenMath:
units_time1.omcd
Defines:
calendar_month, calendar_year, day, hour, minute, second, week
Date:
2004-08-27
Version:
1 (Revision 1)
Review Date:
2017-12-31
Status:
experimental


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  Author: OpenMath Consortium (James Davenport)
  SourceURL: https://github.com/OpenMath/CDs
            

This CD defines symbols to represent the basic physical units of time in the SI (syst\'eme international) system of units. and therefore most other modern systems such as "Imperial" and "U.S.".


second

Description:

This symbol represents the measure of one second of time. This is the standard SI unit measure for time.

Commented Mathematical property (CMP):
This is a base unit for the SI system
Signatures:
sts


[Next: minute] [Last: calendar_year] [Top]

minute

Description:

This symbol represents the measure of one minute of time.

Commented Mathematical property (CMP):
1 minute = 60 seconds
Formal Mathematical property (FMP):
1 minute = 60 second
Signatures:
sts


[Next: hour] [Previous: second] [Top]

hour

Description:

This symbol represents the measure of one hour of time.

Commented Mathematical property (CMP):
1 hour = 60 minutes
Formal Mathematical property (FMP):
1 hour = 60 minute
Signatures:
sts


[Next: day] [Previous: minute] [Top]

day

Description:

This symbol represents the measure of one day of time. The definitions below ignore the possibilities of "leap seconds".

Commented Mathematical property (CMP):
1 day = 24 hours
Formal Mathematical property (FMP):
1 day = 24 hour
Signatures:
sts


[Next: week] [Previous: hour] [Top]

week

Description:

This symbol represents the measure of one week of time.

Commented Mathematical property (CMP):
1 week = 7 days
Formal Mathematical property (FMP):
1 week = 7 day
Signatures:
sts


[Next: calendar_month] [Previous: day] [Top]

calendar_month

Description:

This symbol represents the measure of one month of (calendar) time.

Commented Mathematical property (CMP):
1 month = 28..31 days
Formal Mathematical property (FMP):
calendar_month day [ 28 , 31 ]
Signatures:
sts


[Next: calendar_year] [Previous: week] [Top]

calendar_year

Description:

This symbol represents the measure of one year of (calendar) time.

Commented Mathematical property (CMP):
1 year = 365..366 days
Formal Mathematical property (FMP):
calendar_year day [ 365 , 366 ]
Commented Mathematical property (CMP):
1 year = 12 months
Formal Mathematical property (FMP):
1 calendar_year = 12 calendar_month
Signatures:
sts


[First: second] [Previous: calendar_month] [Top]