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:101:1-2021061204101088621492
	https://elibrary.utb.de/doi/book/10.36198/9783838555607 STATUS : 403 → Skipping : https://elibrary.utb.de/doi/book/10.36198/9783838555607
	http://d-nb.info/1235280888/34 STATUS : 301 → Redirecting to : https://d-nb.info/1235280888/34
	https://d-nb.info/1235280888/34 STATUS : 404 → Skipping : https://d-nb.info/1235280888/34

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