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A link relation is a descriptive attribute attached to a hyperlink in order to define the type of the link, or the relationship between the source and destination resources. The attribute can be used by automated systems, or can be presented to a user in a different way. In HTML these are designated with the rel attribute on link, a, or area ...
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A canonical link element is an HTML element that helps webmasters prevent duplicate content issues in search engine optimization by specifying the "canonical" or "preferred" version of a web page. It is described in RFC 6596, which went live in April 2012.
URL redirection, also called URL forwarding, is a World Wide Web technique for making a web page available under more than one URL address. When a web browser attempts to open a URL that has been redirected, a page with a different URL is opened.
An issue inherent to indiscriminate link prefetching involves the misuse of "safe" HTTP methods.The HTTP GET and HEAD requests are said to be "safe", i.e., a user agent that issues one of these requests should expect that the request results in no change on the recipient server. [13]
The HTML code contains some or all of the five main characteristics of a link: link destination ("href" pointing to a URL) link label; link title; link target; link class or link id; It uses the HTML element "a" with the attribute "href" (HREF is an abbreviation for "Hypertext REFerence" [10]) and optionally also the attributes "title", "target ...
If the target of a link is the same as the page on which it appears (a self-link), it is displayed in bold font, as with: Help:Link. Yes, its wiki code is actually [[Help: Link]]. But it is not in the usual link colour and does not react like a link when clicked or when the mouse pointer passes over it.
Dynamic HTML, or DHTML, is a term which was used by some browser vendors to describe the combination of HTML, style sheets and client-side scripts (JavaScript, VBScript, or any other supported scripts) that enabled the creation of interactive and animated documents.