Biber

• How to Rerun Biber on a LaTeX File
  To rerun Biber, compile your LaTeX document once to create its .bcf file, run Biber on the document basename, then compile LaTeX again.
• How to Identify an Entry Key in a BibLaTeX Sourcemap
  Use Biber’s special entrykey source in a BibLaTeX sourcemap to match a citation key and conditionally set a bibliography field.