As with other culturally-constructed traits such as sex, the way in which this concept is described in different cultural contexts may vary. The normalizing attributes are provided as a means of simplifying that variety to Western European norms and should not be used where that is inappropriate. The content of the element may be used to describe the intended concept in more detail, using plain text.
Example
<age value="2" notAfter="1986">under 20 in the early eighties</age>