Info, an URL is formed like that: protocol://[subdomain]host[port][/pfad][#<fragment>][query]
[] <- means optional!
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protocol: is normally http oder https.
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subdomain: Beispiele -> https://naturzukunft.solidcommunity.net/ versus https://helmutwolman.solidcommunity.net
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host: e.g. facebook.com
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port: theoretically there can be such a thing: https://anbieter.de:9999/KundeA and https://anbieter.de:4444/KundeB
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path
a. path with any tokens separated by /
b. fragment is a chapter (or part) of a resource (e.g. HTML page) e.g. https://helmutwolman.solidcommunity.net/profile/card#me -
https://rdf.dev.osalliance.com/rdf4j-server/repositories/kvm?sparql=SELECT * WHERE { ?s ?p ?o . } LIMIT 10
That goes already very into the detail! But I have seen that in KVM very complex URL’s are stored. Mostly they were Facebook domains!