Denis Bradford wrote: > Yes, you're breaking the DocBook model. If you click Help > Show Content > Model in XMLmind (with a DocBook doc open) and browse the DTD, you'll > see that refentry is a child of reference. So if you create a reference > in your book instead of a chapter, you should be able to include your > referentry's in it.
Yes, Mr Oliver almost certainly attempted to paste references to one or more refentry elements at the wrong places. However, there are several elements other than a reference element where you can insert refentry children. See http://www.docbook.org/tdg/en/html/refentry.html

