<settlement> (settlement) contains the name of a settlement such as a city, town, or village identified
as a single geo-political or administrative unit. [13.2.3 Place Names]
<sch:rule context="tei:*[@calendar]"> <sch:assert test="string-length( normalize-space(.) ) gt 0"> @calendar indicates one or more systems or calendars to which the date represented by the content of this element
belongs, but this <sch:name/> element has no textual content.</sch:assert> </sch:rule>