Footnotes in DocBook require other than the default settings for some features:
[HTMLOptions]
; Footnotes = Jump (HTML default, at end), Embed (between []),
; Inline (XML default), or None
Footnotes = Inline
; FootInlineParaTag = tag for beginning and ending inline footnote
; paras
FootInlineParaTag = para
; FootInlineIDPrefix = start of ID attr for inline footnotes; rest
; is sequential number starting with 1 at start of file.
FootInlineIDPrefix = foot
; UseFootXrefTag = No (HTML default) or Yes (XML default)
UseFootXrefTag = Yes
; FootInlineRefTag = tag for xrefs to inline footnotes, uses linkend
; for href attribute, for DocBook
FootInlineXrefTag = footnoteref