Since our recent Spring Boot upgrade (to v2), I've started to see these warnings (in Tomcat) when Spring Boot starts up:
file:///dspace/config/crosswalks/oai/metadataFormats/oai_openaire.xsl; Line #611; Column #68; "select" attribute is not allowed on the xsl:attribute element!
This error refers to this line of the new OpenAIREv4 metadata format configuration for OAI-PMH:
Paulo Graça I'm assigning this to you for investigation. Hopefully it's a relatively simple fix.