To be picky, it should be "URIs are the uniform way to locate resources", not "URLs" - software, web and general computer usage today extends beyond the typical scheme format of "protocol://address", f.e. handing out a Spotify URI to someone, clickable in their IRC client, or even directly pastable in their browser's address field: spotify:track:5IsPWc2uTiVINs3Lfn8s9o
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To be picky, it should be "URIs are the uniform way to locate resources", not "URLs" - software, web and general computer usage today extends beyond the typical scheme format of "protocol://address", f.e. handing out a Spotify URI to someone, clickable in their IRC client, or even directly pastable in their browser's address field: spotify:track:5IsPWc2uTiVINs3Lfn8s9o
To be even more picky, "URIs are the uniform way to identify resources" or "URLs are the uniform way to locate resources"