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:101:1-2021030321315559567432
	https://doi.org/10.1557/PROC-847-EE6.1 STATUS : 302 → Redirecting to : http://link.springer.com/10.1557/PROC-847-EE6.1
	http://link.springer.com/10.1557/PROC-847-EE6.1 STATUS : 301 → Redirecting to : https://link.springer.com/article/10.1557/PROC-847-EE6.1
	https://link.springer.com/article/10.1557/PROC-847-EE6.1 STATUS : 303 → Redirecting to : https://idp.springer.com/authorize?response_type=cookie&client_id=springerlink&redirect_uri=https%3A%2F%2Flink.springer.com%2Farticle%2F10.1557%2FPROC-847-EE6.1
	https://idp.springer.com/authorize?response_type=cookie&client_id=springerlink&redirect_uri=https%3A%2F%2Flink.springer.com%2Farticle%2F10.1557%2FPROC-847-EE6.1 STATUS : 302 → Redirecting to : https://idp.springer.com/transit?redirect_uri=https%3A%2F%2Flink.springer.com%2Farticle%2F10.1557%2FPROC-847-EE6.1&code=cd3fa449-af25-40f2-bdc4-f69fa590c397
	https://idp.springer.com/transit?redirect_uri=https%3A%2F%2Flink.springer.com%2Farticle%2F10.1557%2FPROC-847-EE6.1&code=cd3fa449-af25-40f2-bdc4-f69fa590c397 ERROR : Got more than maximum allowed 3 redirects! Stopping to follow.
	https://d-nb.info/1228517789/34 Success. Document available.

Please contact the responsible organisation if you experience any errors with the URLs.