We can't find the page you've requested - it could have been moved or the link you follow could be outdated.
In a word - Metadata!
404 isn't just a "number" - its a code, from a set of well-defined and standardised codelist that all web browsers know and understand.
This metadata can then be visualised, like in the example on the right - so it can be easily digested by users like you.
Because the metadata about these codes has been recorded and endorsed, all web browsers (and users like you) can interpret this code accurately, and can make intelligent decisions about how to handle a web page.
This is what the Aristotle Metadata Registry can do for you - record your codes and definitions, so your data makes sense.
And because you know that 404 means the page isn't here, you can
Source: https://tools.ietf.org/html/rfc7231
Common codes include:Code | Meaning |
---|---|
200 | ✅ Request was successful |
403 | 🚫 Request forbidden |
404 | 😖 Resource not found |
500 | 💥 Server error |
Code | Meaning |
---|---|
402 | 🤑 Payment required |
418 | ☕ I am a teapot |
451 | 🔥 Content censored |