Uniform Resource Locator

web

Definition

Uniform Resource Locator (URL)

A URL is an identifier for a document on the Web, structured as

$$\text{scheme://host:port/path?query\#fragment}$$

where the optional elements are the port, query string, and fragment (after #). The query string is a list of key=value pairs separated by &. Reserved characters in a URL must be percent-encoded, e.g. space $\to$ %20, newline $\to$ %0a, & $\to$ %26.

Example

Example

https://httpbin.org:443/get?user=marco&admin=1#test

• scheme: https
• host: httpbin.org
• port: 443
• path: /get
• query: user=marco&admin=1
• fragment: test