This is a common tech confusion — let’s clear it up:
| Term | Stands For | Meaning |
| URI | Uniform Resource Identifier | Identifies a resource, either by name, location, or both |
| URL | Uniform Resource Locator | A type of URI that specifies the address of a resource on the internet |
https://example.com/products?id=123
This tells you what the resource is (product page) and where to find it (location).
urn:isbn:0451450523
This is a name-based identifier, not a web address.
A URL is a kind of URI that provides the location of something on the web (like a full website link).
A URI is a broader term that refers to anything used to identify a resource — not just web addresses.
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