Add additional text to grouped bibliography entries with biblatex

Question

In my bachelor thesis I have a few references that consist of several bibliography entries that are grouped via biblatex's command \defbibentryset (using biber as backend). Now I wonder if it is possible to add some text within these grouped entries, for example to indicate an erratum paper by adding something like "(E)" after the entry:

[1] J. P. Perdew, K. Burke, M. Ernzerhof, Phys. Rev. Lett. 1996, 77, 3865; J. P. Perdew, K. Burke, M. Ernzerhof, Phys. Rev. Lett. 1997, 78, 1396 (E).

Another example would be the creation of a reference with grouped entries that should look like this:

[2] E. H. Lieb, „Density Functionals for Coulomb Systems“ in Physics as Natural Philosophy: Essays in Honor of Laszlo Tisza on His 75th Birthday (Eds.: A. Shimony, H. Feshbach), MIT Press, Cambridge, MA, 1982, pp. 111–149; a revised version appeared in E. H. Lieb, Int. J. Quantum Chem. 1983, 24, 243.

In the last example the phrase "a revised version appeared in" is the part that should be added to biblatex's standard output.
My question is: Can this be achieved with biblatex (or another package) or do I have to make these changes manually in the *.bbl file.

Answer 1

In your first example, "(E)" may simply be added by using the addendum field of the corresponding bibentry. For your second example, I suggest to also use the addendum field (in this case the one of the "Lieb 1982" bibentry) and to remove the closing semicolon by adding \nopunct at the end of the addendum field.

\documentclass{article}

\usepackage{biblatex}

\renewbibmacro{in:}{%
  \ifentrytype{article}{}{%
  \printtext{\bibstring{in}\intitlepunct}}}

\usepackage{filecontents}

\begin{filecontents}{\jobname.bib}
@incollection{Lie82,
  author = {Lieb, E. H.},
  year = {1982},
  title = {Density Functionals for Coulomb Systems},
  booktitle = {Physics as Natural Philosophy: Essays in Honor of Laszlo Tisza on His 75th Birthday},
  editor = {Shimony, A., and Feshbach, H.},
  location = {Cambridge, \mkbibacro{MA}},
  publisher = {\mkbibacro{MIT} Press},
  pages = {111--149},
  addendum = {A revised version appeared in\nopunct},
}
@article{Lie83,
  author = {Lieb, E. H.},
  year = {1983},
  journaltitle = {Int. J. Quantum Chem.},
  volume = {24},
  pages = {243},
}
\end{filecontents}

\addbibresource{\jobname.bib}

\defbibentryset{Lie}{Lie82,Lie83}

\begin{document}

\printbibliography

\end{document}