text: CREATE EXTENSION oai_fdw;
  
  -- German National Library
  CREATE SERVER oai_server_dnb FOREIGN DATA WRAPPER oai_fdw 
  OPTIONS (url 'https://services.dnb.de/oai/repository');
  
  -- Münster University Library
  CREATE SERVER oai_server_ulb FOREIGN DATA WRAPPER oai_fdw 
  OPTIONS (url 'https://sammlungen.ulb.uni-muenster.de/oai');         
  
  -- British and Irish Orthoptic Journal	
  CREATE SERVER oai_server_bioj FOREIGN DATA WRAPPER oai_fdw 
  OPTIONS (url 'https://www.bioj-online.com/jms/index.php/up/oai/');   
  
  -- Brazilian Journal of Implantology and Health Sciences
  CREATE SERVER oai_server_bjihs FOREIGN DATA WRAPPER oai_fdw 
  OPTIONS (url 'https://bjihs.emnuvens.com.br/bjihs/oai');   
  
  -- National Library of the Netherlands
  CREATE SERVER oai_server_kbnl FOREIGN DATA WRAPPER oai_fdw 
  OPTIONS (url 'http://services.kb.nl/mdo/oai');  