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:101:1-2409291117286.020088292385
	https://portal.dnb.de/bookviewer/view/1337866253 STATUS : 403 → Skipping : https://portal.dnb.de/bookviewer/view/1337866253

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