Presentation of year and ISBN of BetterBibLaTeX from Zotero in LaTeX

Question

First of all my question: How can I adjust biblatex to show only the year from the date and not to delete the dashes from the ISBN?

Here is my MWE:

BetterBibLaTeX 1.6.6 within Zotero Standalone 4.0 gives me an export of a book like this:

@book{west_introduction_2000,
  edition = {2},
  title = {Introduction to Graph Theory},
  isbn = {978-0-13-014400-3},
  pagetotal = {470},
  timestamp = {2015-11-23T15:45:12Z},
  publisher = {{Prentice Hall}},
  author = {West, Douglas Brent},
  year = {22.08.2000}
}

With the MWE LaTeX document

\documentclass{scrartcl}

\usepackage[style = authoryear, url = false]{biblatex}
\addbibresource{book.bib} 

\begin{document}
\textcite{west_introduction_2000}
\printbibliography
\end{document}

I get the following result:

Edit:

Here is the corresponding issue on GitHub.

Answer 1

The ISBN is stripped of its hyphens due to a bug in Biber's new ISBN features (as requested in Automatically validate and format ISBNs) that has already been fixed in version 2.3 (see #89 at the Biber bugtracker on github). Version 2.3 of Biber is currently not available on CTAN, but as a developer/testing version on sourceforge.

The second problem is related to a malformed year field. It can only hold a year (or rather everything you write in there will be considered the year), entire dates can be specified in the date field where the correct input format is YYYY-MM-DD (with leading zeroes if needed)

date = {2000-08-22}

If you need your malformed year fields to work now and out of the box, you can use the following sourcemap as a temporary relief

\DeclareSourcemap{
  \maps[datatype=bibtex]{
    \map{
      \step[fieldsource=year, match=\regexp{([0-9]{2}).([0-9]{2}).([0-9]{4})}, final]
      \step[fieldset=date, fieldvalue={$3-$2-$1}]
      \step[fieldset=year, null]
    }
  }
}

This will match year fields in DD.MM.YYY format and writes the correctly formatted date in YYYY-MM-DD format to the date field. It then clears the year field to avoid confusion.

Of course, the code will only work for the specific problem in your MWE above; if you have year fields with even weirder formats, you will have to think of another ad-hoc solution to address those as well.

MWE

\documentclass{scrartcl}

\usepackage[style = authoryear, url = false]{biblatex}

\usepackage{filecontents}
\begin{filecontents*}{\jobname.bib}
@book{west_introduction_2000,
  edition = {2},
  title = {Introduction to Graph Theory},
  isbn = {978-0-13-014400-3},
  pagetotal = {470},
  publisher = {{Prentice Hall}},
  author = {West, Douglas Brent},
  year = {22.08.2000}
}
\end{filecontents*}

\addbibresource{\jobname.bib}


\DeclareSourcemap{
  \maps[datatype=bibtex]{
    \map{
      \step[fieldsource=year, match=\regexp{([0-9]{2}).([0-9]{2}).([0-9]{4})}, final]
      \step[fieldset=date, fieldvalue={$3-$2-$1}]
      \step[fieldset=year, null]
    }
  }
}

\begin{document}
\textcite{west_introduction_2000}
\printbibliography
\end{document}

Answer 2

The real BibLaTeX experts will need to chime in on the ISBN, but for the date, that biblatex file is wrong: It should have

date = {2000-08-22}

instead of that year entry and that's what I get from Zotero/Better BibLaTex. So make sure that you are 1) Using the latest version of Better BibLaTeX 2) Selecting Better BibTeX's own BibLaTeX export format ("Better BibLaTeX")

and this should come out correctly.