Examples

Save every capital E in every article title

-b example.bib -sc +t article +k title +m E

Loads the bibliography example.bib

The -sc will load the save capitals command

The +t article parameter will only select entries of typ article

The +k title parameter will only select title keys

The +m E parameter will only select capital E letters

Example: Enclosing capital E in article titles

Before:

@Article{parsons:1990,
  author = {Parsons, Terence},
  title  = {Events in the Semantics of English},
  year   = {1990},
  month  = {01},
  place  = {Cambridge, MA},
}

After:

@Article{parsons:1990,
  author = {Parsons, Terence},
  title  = {{E}vents in the Semantics of {E}nglish},
  year   = {1990},
  month  = {01},
  place  = {Cambridge, MA},
}

Remove every key except author title year pages publisher month place

-b example.bib -re +k author title year pages publisher month place +v y

Loads the bibliography example.bib

The -re parameter will load the remove entry command

The +k author title year pages publisher month place parameter will only select keys of typ title year pages publisher month place

The +v y parameter will invert the key selection, meaning that only title year pages publisher month place will not be removed

Example: Remove every key except author title year pages publisher month place

Before:

@Article{vanderDoes1991,
  author  = {van der Does, Jaap},
  title   = {A generalized quantifier logic for naked infinitives},
  journal = {Linguistics and Philosophy},
  year    = {1991},
  volume  = {14},
  number  = {3},
  pages   = {241--294},
  month   = {Jun},
  issn    = {1573-0549},
  day     = {01},
  doi     = {10.1007/BF00627404},
  url     = {https://doi.org/10.1007/BF00627404},
}

@Book{kroch1974semantics,
  title     = {The Semantics of Scope in English},
  publisher = {Massachusetts Institute of Technology, Department of Foreign Literatures and Linguistics},
  year      = {1974},
  author    = {Kroch, Anthony S.},
  series    = {MIT working papers in linguistics},
  url       = {https://books.google.de/books?id=FcsvvwEACAAJ},
}

After:

@Article{vanderDoes1991,
  author  = {van der Does, Jaap},
  title   = {A generalized quantifier logic for naked infinitives},
  year    = {1991},
  pages   = {241--294},
  month   = {Jun},
}

@Book{kroch1974semantics,
  title     = {The Semantics of Scope in English},
  publisher = {Massachusetts Institute of Technology, Department of Foreign Literatures and Linguistics},
  year      = {1974},
  author    = {Kroch, Anthony S.},
}