Cfrgtkky

I have two questions regarding biblatex.

1. 
   

   I have bibliography entries from MathSciNet, and this has several fields. For instance one such looks like:

   
   
   

   @article {Gratzer2013,
   
       AUTHOR = {Gr"{a}tzer, G.},
   
        TITLE = {The order of principal congruences of a bounded lattice},
   
      JOURNAL = {Algebra Universalis},
   
     FJOURNAL = {Algebra Universalis},
   
       VOLUME = {70},
   
         YEAR = {2013},
   
       NUMBER = {1},
   
        PAGES = {95--105},
   
         ISSN = {0002-5240},
   
      MRCLASS = {06B10 (06A06)},
   
     MRNUMBER = {3073941},
   
   MRREVIEWER = {S. Parameshwara Bhatta},
   
          DOI = {10.1007/s00012-013-0242-3},
   
          URL = {https://doi.org/10.1007/s00012-013-0242-3},
   
   }
   
   

   
   
   

   While using the following command:

   
   
   

   {    
   
   %%%% biblatex usage
   
   
   
   usepackage[style=numeric, backend=biber, backref, bibencoding=utf8, sorting=nyt]{biblatex} 
   
   
   
   addbibresource{ref.bib}
   
   
   
   }
   
   

   
   
   

   and then compiling with biber I do not get the data from "MRNUMBER" or "MRCLASS" or "MRREVIEWER".

   
   
   

   My question is: what should I do to get these or any other relevant data for my bibliography. Is there any standard class which does this?

   
   



2. My old .bib files were compiled manually and do not have the information that I have presently using the MathSciNet facility. Is it possible to automatically add these information to hundreds of the bibliography entries over several .bib files?

Switching from amsrefs to biblatex already shows how you can make the mrnumber show in the bibliography, so here we show mrclass and mrreviewer as well.

The idea is the same. First we define a new datamodel file (.dbx) with the new fields and load that with the datamodel option. Then we need formats for those fields and finally we need to print the fields in a bibmacro (mrinfo) that is called in one of the standard macros (doi+eprint+url).

documentclass[british]{article}

usepackage[T1]{fontenc}

usepackage[utf8]{inputenc}

usepackage{babel}

usepackage{csquotes}

usepackage{filecontents}



begin{filecontents*}{mrnumber.dbx}

DeclareDatamodelFields[type=field,datatype=literal]{mrnumber,mrclass}

DeclareDatamodelFields[type=list, datatype=name]{mrreviewer}

DeclareDatamodelEntryfields{mrnumber,mrclass,mrreviewer}

end{filecontents*}



usepackage[style=numeric, backend=biber, sorting=nyt, datamodel=mrnumber]{biblatex}

usepackage{hyperref}





DeclareFieldFormat{mrnumber}{%

  ifhyperref

    {href{http://www.ams.org/mathscinet-getitem?mr=1#1}{MR#1}}

    {MR#1}}



DeclareFieldFormat{mrclass}{#1}



DeclareNameAlias{bymrreviewer}{byeditor}



newbibmacro*{mrinfo}{%

  printfield{mrnumber}%

  iffieldundef{mrclass}

    {setunit*{addcommaspace}}

    {setunit*{addspace}}%

  printfield{mrclass}%

  setunit*{addcommaspace}%

  ifnameundef{mrreviewer}

    {}

    {bibstring{byreviewer}%

     setunit{addspace}%

     printnames[bymrreviewer]{mrreviewer}}}



newtoggle{bbx:mrinfo}

DeclareBibliographyOption[boolean]{mrinfo}[true]{settoggle{bbx:mrinfo}{#1}}

ExecuteBibliographyOptions{mrinfo}



renewbibmacro*{doi+eprint+url}{%

  iftoggle{bbx:doi}

    {printfield{doi}}

    {}%

  newunitnewblock

  iftoggle{bbx:mrinfo}

    {usebibmacro{mrinfo}}

    {}%

  newunitnewblock

  iftoggle{bbx:eprint}

    {usebibmacro{eprint}}

    {}%

  newunitnewblock

  iftoggle{bbx:url}

    {usebibmacro{url+urldate}}

    {}}





begin{filecontents*}{jobname.bib}

@article{gratzer,

  author     = {Grätzer, G.},

  title      = {The order of principal congruences of a bounded lattice},

  journal    = {Algebra Universalis},

  volume     = {70},

  year       = {2013},

  number     = {1},

  pages      = {95--105},

  mrclass    = {06B10 (06A06)},

  mrnumber   = {3073941},

  mrreviewer = {S. Parameshwara Bhatta},

  doi        = {10.1007/s00012-013-0242-3},

}

end{filecontents*}

addbibresource{jobname.bib}

addbibresource{biblatex-examples.bib}



begin{document}

cite{gratzer,sigfridsson}



printbibliography

end{document}

For the second issue I suggest you ask a new question since that is not related to biblatex at all. You could query https://mathscinet.ams.org/mrlookup with your .bib entries and get the result. As long as your author and title fields are accurate (and coincide with the info on MathSciNet) that should give you the correct entry. The Python tool https://pypi.org/project/bibupdate/ seems to do just that.