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:101:1-20140609529
	http://rap-verlag.com/home/?p=664 RESTEASY004655: Unable to invoke request: org.apache.http.conn.ConnectTimeoutException: Connect to rap-verlag.com:80 [rap-verlag.com/87.230.61.112] failed: Connect timed out
	http://d-nb.info/105201609X/34 STATUS : 301 → Redirecting to : https://d-nb.info/105201609X/34
	https://d-nb.info/105201609X/34 STATUS : 404 → Skipping : https://d-nb.info/105201609X/34

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