The document I'm creating with xep has several articles, wich start with
a number. So I'm creating running headers with fo:marker and
fo:retrieve-marker. The header displays the first article in the page
and the last, for example 'Nr. 35-36'. But most pages contain only one
article, so the header displays for example 'Nr. 35-35'. But what I want
is that it only displays 'Nr. 35' when there is only one article on a page.
Is this possible?