bibliographicResource can contain more than one ISBN

[ltog]

A bibliographicResource can contain more than one ISBN.

Example:

curl -XGET 'sb-s6.swissbib.unibas.ch:8080/testsb/bibliographicResource/_search' -d '
{
"query": {
"filtered": {
"filter": {
"bool": {
  "must": {"term": {"@id": "http://data.swissbib.ch/resource/091861764"}}
}
}
}
}
}
'

This leads to an array-to-string conversion at

vufind/module/LinkedSwissbib/src/LinkedSwissbib/RecordDriver/ElasticSearchRDF.php

Line 356 in 3ccdb53

$link_cover = $url_start . $isbn10 . $url_end;

[ltog]

@PhilippKuntschik @marahellstern : What should we do in such a case? Just display any of the covers?

[marahellstern]

@ltog @PhilippKuntschik : Yes, just display any of the covers. I don't see the need to choose a particular cover and I wouldn’t know what criteria to use to make this choice/selection.