<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>
About a year back, a question of considerable interest was agitated in the <orgName key="PAS1" type="voluntary"> <placeName key="PEN">Pennsyla.</placeName> Abolition Society </orgName> [...]