According to the documentation on DB 5
(http://www.docbook.org/tdg5/en/html/remark.html), it appears that a large
number of inline elements ought to be able to appear inside a <remark>
element. However, the docbook.rng
(http://www.docbook.org/xml/5.0b9/rng/docbook.rng) appears to allow only a
few of these:
inlinemediaobject, remark, superscript, subscript,
xref, link, olink, anchor, biblioref, alt, annotation,
indexterm.singular, indexterm.startofrange, indexterm.endofrange,
phrase, replaceable
Missing from this list afaict are many of the gui inlines, markup inlines,
operating system inlines, etc. that the documentation says should be
allowed (and which I believe DocBook 4.5 allowed).
Perhaps this is intentional; there are some comments at
http://www.oasis-open.org/docbook/specs/docbook-5.0b6-spec-wd-01.html to
the effect that DB5 "drastically" reduced the content models of many
inlines. This description uses the