bibtex "keywords" field is separated by space instead of comma

[Thomas Niebler]

The "keywords" field in the BibTeX export is separated by spaces instead of commas. However, commas are the standard separator in BibTeX.

[Daniel Zoller]

There is no keyword field in the BibTeX standard nor a definition how keywords are seperated, so both space and commas can be used and are used as seperator. We will keep our space seperator to be compatible with other tools that build up on space seperated keywords.

Please note that the biblatex package uses a comma as the default seperator (see p. 25 of the docu).