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A Uniform Resource Identifier helps identify a source without ambiguity. Many URI schemes are registered with the IANA ; however, there exist many unofficial URI schemes as well. Mobile deep links are one example of a class of unofficial URI schemes that allow for linking directly to a specific location in a mobile app.
Therefore, URLs are a subset of URIs, ie. every URL is a URI (and not necessarily the other way around). [2] Other URIs provide only a unique name, without a means of locating or retrieving the resource or information about it; these are Uniform Resource Names (URNs). The web technologies that use URIs are not limited to web browsers.
This is an accepted version of this page This is the latest accepted revision, reviewed on 28 January 2025. Protocol and file format to list the URLs of a website For the graphical representation of the architecture of a web site, see site map. This article contains instructions, advice, or how-to content. Please help rewrite the content so that it is more encyclopedic or move it to ...
A URL will often comprise a path, script name, and query string.The query string parameters dictate the content to show on the page, and frequently include information opaque or irrelevant to users—such as internal numeric identifiers for values in a database, illegibly encoded data, session IDs, implementation details, and so on.
Absolute URLs are URLs that start with a scheme [5] (e.g., http:, https:, telnet:, mailto:) [6] and conform to scheme-specific syntax and semantics. For example, the HTTP scheme-specific syntax and semantics for HTTP URLs requires a "host" (web server address) and "absolute path", with optional components of "port" and "query".
The URL that initiates the redirect may be kept to show up in search results, as the redirect indicates a temporary nature. Under certain circumstances it was possible to exploit this behavior by applying temporary redirects to well-ranking URLs, leading to a replacement of the original URL in search results by the URL that initialized the ...
"For example, when Google finds identical content instances, it decides to show one of them. Its choice of the resource to display in the search results will depend upon the search query." [8] According to Google, the canonical link element is not considered to be a directive, but rather a hint that the ranking algorithm will "honor strongly ...
Because protocol relative is relative to the site where the URL is linked from, all protocol relative URLs on Wikipedia will render as HTTPS. This means protocol relative links should no longer be used on Wikipedia, and existing protocol relative links should be converted to either the HTTP or HTTPS scheme .