Hi all,

I just discovered that DSpace (XMLUI, 1.8.2 but 3.0 has the same behaviour) generates the citation_pdf_url header for Google Scholar on an item page if and only if
  •  the item has exactly one bitstream in the ORIGINAL bundle (or the first such bundle, to be precise); and
  •  this bitstream is of type application/pdf

Code in master here: https://github.com/DSpace/DSpace/blob/master/dspace-api/src/main/java/org/dspace/app/util/GoogleMetadata.java#L1007

I found old discussion around this in Jira here: https://jira.duraspace.org/browse/DS-396?focusedCommentId=17461&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-17461 that explains what I assume is still the reasoning behind the current explanation:

How does one choose, for instance, a.) which PDF in an item with multiple PDF bitstreams, b.) what is specified for a URL when there is no PDF for an item, c.) whether or not to specify a PDF if the only PDF available is not the main representative bitstream of the item. Google Scholar has said they are not interested in having citation tags for an item if this field is not provided for.

I find this a bit counter-intuitive especially in the case of items with one PDF file plus one more more files in a different format -- surely there it should be fine to use the single PDF file in the citation_pdf_url? Are there any other opinions around this?

cheers,
Andrea

-- 
Dr Andrea Schweer
IRR Technical Specialist, ITS Information Systems
The University of Waikato, Hamilton, New Zealand


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