I recently noted that citations exported from Oxford Academic have a plus sign in front of the URL. For example, in this paper, the bibtex export contains the following field definition:

URL = { + http://dx.doi.org/10.1093/bioinformatics/btq180},

I took this to be a bug in the automatic citation export code and just deleted it when importing the citation. But since I've now repeatedly seen this pattern, I started to wonder: Is this some feature? Does the plus sign do something?

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  • No it just looks absolutely wrong to me. The url field should contain only the non-escaped verbatim URL and nothing more. In this case, however, I would only export the doi field, the url adds nothing to it. – moewe Aug 18 '17 at 13:45
  • Ok thanks. Maybe I'll drop a note to the publisher about this. (The doi field is given as well; the URL is maybe provided for people or tools that don't know how to construct it from the DOI.) – lenz Aug 18 '17 at 15:03

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