PKP Bugzilla – Bug 8261
CrossRef OpenURL method is deprecated; Citation Assistant Connector Fails
Last modified: 2013-09-11 12:06:20 PDT
Forum user mentioned that CrossRef connector is not working: http://pkp.sfu.ca/support/forum/viewtopic.php?f=2&t=10115&p=39350#p39350
I never looked too intently at the lookup services in the past, only the parsing services, so I don't know how it used to work, but judging from https://github.com/pkp/pkp-lib/blob/master/plugins/citationLookup/crossref/filter/CrossrefNlm30CitationSchemaFilter.inc.php, it used http://www.crossref.org/openurl/, which appears to no longer be supported.
It may be possible to redo this functionality in accordance with http://search.crossref.org/help/api, but prototyping something with curl and being able to intelligently edit Florian's code are worlds apart for me...