2. Dataset definitions

Owned by Miriam van den Hoven (Deactivated)
Last updated: Feb 10, 2020 by Ruben de Looff

In this chapter all definitions for both Attributes and Metrics are presented.  To keep things organized, we've created three separate pages, so you can find the definitions per dataset.


The following information is recurring in all underlying chapters: ISO week & ISO year

The ISO week and ISO year are issued by the International Organization for Standardization and are used to create a standard and a comparable week and year number. A week number in ISO will always start on a Monday, independent of the actual first date of the year (January first). The first week of the year always contains the 4th of January & the Thursday is always a January-day. So basically the first week can be as below, or anything in between:


Day of WeekDate
Day of WeekDate
Monday4th of JanuaryMonday29th of December
Tuesday5th of JanuaryTuesday30th of December
Wednesday6th of JanuaryWednesday31st of December
Thursday7th of JanuaryThursday1st of January
Friday8th of JanuaryFriday2nd of January
Saturday 9th of JanuarySaturday 3rd of January
Sunday10th of JanuarySunday4th of January


Due to this mapping, the ISO year has 52 weeks (364 days) or 53 weeks (371 days). The week number also determines which ISO year a date belongs to (e.g. December 31st 2019 belongs to ISO week 1 of the next year, so the ISO year of 31-12-2019 is 2020).