With this function, the resolver checks all associated URLs and marks them either with a green tick or, in the event of an error, with a red cross. Users are redirected to the first URL marked in green.

Analyse	urn:nbn:de:101:1-2013070907
	http://www.vorwaertsbuchverlag.de/buecher/sieht-die-zukunft-alt-aus STATUS : 301 → Redirecting to : http://xn--vorwrts-8wa.debuecher/sieht-die-zukunft-alt-aus
	http://xn--vorwrts-8wa.debuecher/sieht-die-zukunft-alt-aus RESTEASY004655: Unable to invoke request: java.net.UnknownHostException: xn--vorwrts-8wa.debuecher: Name or service not known
	https://d-nb.info/1036872068/34 Success. Document available.

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