Biblatex, compiling the whole bibliography with \nocite and marking used entries of the document

Question

I have a large bibliography file. In my paper I dont use all entries from my biblatex bibliography. When I use \printbibliography and \nocite{*}, is it possible to attach the bolded word "gelesen" in the output to every entry that is cited in the paper, while the non-cited entries go without any further specification?

Answer 1

biblatex has the option citetracker, i.e.,

\usepackage[citetracker]{biblatex}

Then you can use the command \ifciteseen.

A possibility would be

\renewbibmacro{finentry}{%
  \finentry
  \ifciteseen{\addspace Gelesen.}{}%
}

Answer 2

You could use hyperref with the pagebackref option, or the citeref package, which does approximately the same. Then each reference entry gets a list of page numbers, where this entry has been cited. No page numbers => not cited.