RDF integration creates incorrect assertion that an orcid-less author is owl:sameAs http://orcid.org/ !

[jesusbagpuss]

Under v3.3.16 (and probably later), if an author doesn't have an ORCID, when the 'people' triples are generated, people without an ORCID are presented as owl:sameAs http://orcid.org/

orcid_support_advance/cfg/cfg.d/z_orcid_support_advance_rdf_triples.pl

Line 96 in cacb7ff

$e_orcid = "http://orcid.org/" . $all_people->{$person_uri}->{orcid} if defined $all_people->{$person_uri}->{orcid};

The defined above should be EPrints::Utils::is_set.

Caution when running queries against the triples table, only the tripleid, primary_resource and secondary_resource columns are indexed. The triple table contains a lot of rows. Running a query that doesn't contain one of the indexed columns can be long-running.

To find examples triples, find an EPrint with multiple authors, some who do, and some who don't have ORCIDs.
Run the following query, altering the primary_resource to match your selected EPrint ID:

mysql> SELECT primary_resource, secondary_resource, subject, predicate, object, type 
  FROM triple 
  WHERE primary_resource = 'epid:eprint/205746' AND predicate = 'owl:sameAs' AND type = 'foaf:Person' LIMIT 20;
+--------------------+--------------------------------------------------+--------------------------------------------------+------------+--------------------------------------+-------------+
| primary_resource   | secondary_resource                               | subject                                          | predicate  | object                               | type        |
+--------------------+--------------------------------------------------+--------------------------------------------------+------------+--------------------------------------+-------------+
| epid:eprint/205746 | epid:person/ext-25ebb8c09ef522884f79d6718983dc84 | epid:person/ext-25ebb8c09ef522884f79d6718983dc84 | owl:sameAs | http://orcid.org/0000-0002-6619-4560 | foaf:Person |
| epid:eprint/205746 | epid:person/ext-e5fabd69fbd3a769f67ce2b8ebe8b930 | epid:person/ext-e5fabd69fbd3a769f67ce2b8ebe8b930 | owl:sameAs | http://orcid.org/                    | foaf:Person |
| epid:eprint/205746 | epid:person/ext-883ceb14b6692b4f4ee7a13c642fdcfb | epid:person/ext-883ceb14b6692b4f4ee7a13c642fdcfb | owl:sameAs | http://orcid.org/                    | foaf:Person |
| epid:eprint/205746 | epid:person/ext-6c69404de6ba5c40ac8d6e248ce0d903 | epid:person/ext-6c69404de6ba5c40ac8d6e248ce0d903 | owl:sameAs | http://orcid.org/                    | foaf:Person |
| epid:eprint/205746 | epid:person/ext-69eb92a466fb0d58ae6ad625b7a75208 | epid:person/ext-69eb92a466fb0d58ae6ad625b7a75208 | owl:sameAs | http://orcid.org/                    | foaf:Person |
+--------------------+--------------------------------------------------+--------------------------------------------------+------------+--------------------------------------+-------------+