URL normalization

[annethyme]

---

title: URL normalization
key: url-normalization

A process to transform URLs in a standardised and consistent way, to make it possible to determine if two syntactically different URLs may be equivalent. (Source: Wikipedia).

Several types of URL normalization exists. Some types of normalization preserve the semantics of the URL, some usually preserve the semantics, and some types change the semantics.

For the purpose of ACT rules, we only consider the types of URL normalization that preserve the semantics of the URL. These normalization types are:

• Case Normalization
• Percent-Encoding Normalization
• Scheme-Based Normalization

Relative URLs first need to be resolved to full URLs before doing the comparison.

[jribbens]

https://url.spec.whatwg.org/ is relevant to this, even if the specification document itself is ... poor.

[jribbens]

Also consider IDNA.

[jeeyyy]

Close - PR - #220