Property:Date of birth sortkey

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This attribute serves as sortkey for the date of birth. It is not restricted to the date range of Property:Date of birth and allows incomplete dates such as just the year, or the year and the month. See Date-related tables.

For display it depends on what one wants to link. To avoid duplication in the displayed info, one can e.g. link to the year using Property:Born in year, and provide the additional info, if available, in Property:Birthday. If only the month is available, that can be the value of the latter attribute.

<ask sort="date of birth sortkey" link=all limit=500>++date of birth sortkey (normally not displayed) ***warning.png"*" is not a number.**</ask>

Alternatives are linking also to the birthday (like Wikipedia does: April 30) or linking to a month, e.g. on Wikipedia that would be a link like April 1909.

Compare the deprecated Property:Year of birth for just years instead of full dates.

See also:

• Property:Start date sortkey
• Date-related tables
• MetaWikipedia:Help:Sorting#Dates - shows how in tables created with the wikitext for tables (as opposed to those created by an SMW query) an invisible sortkey can be used for Javascript sorting
• wikipedia:Wikipedia:Biographies of living persons#Privacy of birthdays.