Cool URIs Don't Change
Year First Appeared
1998
Creator
Tim Berners-Lee
A classic W3C note by Tim Berners‑Lee arguing that “cool” URIs should be persistent and not change, urging webmasters to design stable, implementation‑agnostic URLs while omitting volatile details such as file extensions, software, status, or topic taxonomies.
Importance in Internet Culture
The essay helped set cultural and architectural expectations that link stability is a social contract and policy commitment, later echoed in the W3C’s Architecture of the World Wide Web and TAG findings on URI persistence and opacity. Its influence shows up in modern standards and government URL policies that prioritize stable, technology‑agnostic addresses.
Interesting Fact
Berners‑Lee’s page explicitly says “The canonical way of making links to the W3C site doesn’t use the extension, ” and the canonical URL for the essay itself omits .html, an intentional, lived example of its guidance. The piece predates the blogosphere’s “permalink” convention (early use cited in March 2000), underscoring how early the Web’s founder pressed for persistent URLs.