Типы ссылок

В HTML следующие типы ссылок показывают отношения между двумя документами, в одном из которых, ссылка ведёт к другому, используя элементы <a>, <area> или <link>.

Список типов ссылок и их значений в HTML
Тип ссылки	Описание	Разрешён в этих элементах	Не разрешён в
`alternate`	If the element is `<link>` and the `rel` attribute also contains the `stylesheet` type, the link defines an alternative style sheet; in that case the `title` attribute must be present and not be the empty string. If the `type` is set to `application/rss+xml` or `application/atom+xml`, the link defines a syndication feed. The first one defined on the page is the default. Otherwise, the link defines an alternative page, of one of these types: for another medium, like a handheld device (if the `media` attribute is set) in another language (if the `hreflang` attribute is set), in another format, such as a PDF (if the `type` attribute is set) a combination of these	`<a>`, `<area>`, `<link>`	Нет
`archives`	Defines a hyperlink to a document that contains an archive link to this one. For example, a blog entry could link to a monthly index page this way. Note: Although recognized, the singular `archive` is incorrect and must be avoided.	`<a>`, `<area>`, `<link>`	Нет
`author`	Defines a hyperlink to a page describing the author or providing a way to contact the author. Note: This may be a `mailto:` hyperlink, but this is not recommended on public pages as robot harvesters will quickly lead to a lot of spam sent to the address. In that case, it is better to lead to a page containing a contact form. Although recognized, the `rev` attribute on `<a>`, `<area>` or`<link>` elements with a link type of `made` is incorrect and should be replaced by the `rel` attribute with this link type.	`<a>`, `<area>`, `<link>`	Нет
`bookmark`	Indicates that the hyperlink is a permalink for the nearest ancestor `<article>` element. If none, it is a permalink for the section that the element is most closely associated to. This allows for bookmarking a single article in a page containing multiple articles, such as on a monthly summary blog page, or a blog aggregator.	`<a>`, `<area>`	`<link>`
`dns-prefetch` Экспериментальная возможность	Hints to the browser that a resources is needed allowing the browser to do a DNS lookup and protocol handshaking before a user clicks the link.	`<link>`	`<a>`, `<area>`
`external`	Indicates that the hyperlink leads to a resource outside the site of the current page; that is, following the link will make the user leave the site.	`<a>`, `<area>`	`<link>`
`first`	Indicates that the hyperlink leads to the first resource of the sequence the current page is in. Note: Other link types related to linking resources in the same sequence are `last`, `prev`, `next`. Although recognized, the synonyms `begin` and `start` are incorrect and must be avoided.	`<a>`, `<area>`, `<link>`	Нет
`help`	If the element is `<a>` or `<area>`, it indicates that the hyperlink leads to a resource giving further help about the parent of the element, and its descendants. If the element is `<link>` it indicates that the hyperlink leads to a resource giving further help about the page as a whole.	`<a>`, `<area>`, `<link>`	Нет
`icon`	Defines a resource for representing the page in the user interface, usually an icon (auditory or visual). The `media`, `type` and `sizes` attributes allow the browser to select the most appropriate icon for its context. If several resources match, the browser will select the last one declared, in tree order. As these attributes are merely hints, and the resources may be inappropriate upon further inspection, the browser will then select another one, if appropriate. Note: Apple's iOS does not use this link type, nor the `sizes` attribute, like others mobile browsers do, to select a webpage icon for Web Clip or a start-up placeholder. Instead it uses the non-standard `apple-touch-icon` and `apple-touch-startup-image` respectively. The `shortcut` link type is often seen before `icon`, but this link type is non-conforming, ignored and web authors must not use it anymore.	`<link>`	`<a>`, `<area>`
`index`	Indicates that the page is part of a hierarchical structure and that the hyperlink leads to the top level resource of that structure. If one or several `up` link types are also present, the number of these `up` indicates the depth of the current page in the hierarchy.	`<a>`, `<area>`, `<link>`	Нет
`last`	Indicates that the hyperlink leads to the last resource of the sequence the current page is in. Note: Other link types related to linking resources in the same sequence are `first`, `prev`, `next`. Although recognized, the synonym `end` is incorrect and must be avoided.	`<a>`, `<area>`, `<link>`	Нет
`license`	Indicates that the hyperlink leads to a document describing the licensing information. If not inside the `<head>` element, the standard doesn't distinguish between a hyperlink applying to a specific part of the document or to the document as a whole. Only the data on the page can indicate this. Note: Although recognized, the synonym `copyright` is incorrect and must be avoided.	`<a>`, `<area>`, `<link>`	Нет
`manifest`	Indicates that the linked file is a Web App Manifest.	`<link>`	`<a>`, `<area>`
`next`	Indicates that the hyperlink leads to the next resource of the sequence the current page is in. Note: Other link types related to linking resources in the same sequence are `first`, `prev`, `last`.	`<a>`, `<area>`, `<link>`	Нет
`nofollow`	Indicates that the linked document is not endorsed by the author of this one, for example if it has no control over it, if it is a bad example or if there is commercial relationship between the two (sold link). This link type may be used by some search engines that use popularity ranking techniques.	`<a>`, `<area>`	`<link>`
`noopener`	Instructs the browser to open the link without granting the new browsing context access to the document that opened it, by not setting the `Window.opener` (en-US) property on the opened window. This is especially useful when opening untrusted links, in order to ensure they cannot tamper with the originating document, while still providing the `Referer` HTTP header (unless `noreferrer` is used as well).	`<a>`, `<area>`	`<link>`
`noreferrer`	Prevents the browser, when navigating to another page, to send this page name, or any other value, as referrer via the `Referer:` HTTP header. (In Firefox, before Firefox 37, this worked only in links found in pages. Links clicked in the UI, like "Open in a new tab" via the contextual menu, ignored this).	`<a>`, `<area>`	`<link>`
`pingback`	Defines an external resource URI to call if one make a comment or a citation about the webpage. The protocol used to make such a call is defined in the Pingback 1.0 specification. Note: if the `X-Pingback:` HTTP header is also present, it supersedes the `<link>` element with this link type.	`<link>`	`<a>`, `<area>`
`preconnect` Экспериментальная возможность	Provides a hint to the browser suggesting that it open a connection to the linked web site in advance, without disclosing any private information or downloading any content, so that when the link is followed the linked content can be fetched more quickly.	`<link>`	`<a>`, `<area>`
`prefetch`	Suggests that the browser fetch the linked resource in advance, as it is likely to be requested by the user. Starting with Firefox 44, the value of the `crossorigin` attribute is taken into consideration, making it possible to make anonymous prefetches. Note: The Link Prefetch FAQ has details on which links can be prefetched and on alternative methods.	`<a>` Не реализовано, `<area>` Не реализовано, `<link>`	Нет
`preload`	Tells the browser to download a resource because this resource will be needed later during the current navigation.	`<link>`	`<a>`, `<area>`
`prerender` Экспериментальная возможность	Suggests that the browser fetch the linked resource in advance, and that it also render the prefetched content offscreen so it can be quickly presented to the user once needed.	`<link>`	`<a>`, `<area>`
`prev`	Indicates that the hyperlink leads to the preceding resource of the sequence the current page is in. Note: You can also use the `next` keyword to specify a link to the next page in the sequence. Although recognized, the synonym `previous` is incorrect and must be avoided.	`<a>`, `<area>`, `<link>`	Нет
`search`	Indicates that the hyperlink reference a document whose interface is specially designing for searching in this document, or site, and its resources. If the `type` attribute is set to `application/opensearchdescription+xml` the resource is an OpenSearch plugin that can be easily added to the interface of some browsers like Firefox or Internet Explorer.	`<a>`, `<area>`, `<link>`	Нет
`stylesheet`	Defines an external resource to be used as a stylesheet. If the `type` is not set, the browser should assume it is a `text/css` stylesheet until further inspection. If used in combination with the `alternate` keyword, it defines an alternative style sheet; in that case the `title` attribute must be present and not be the empty string.	`<link>`	`<a>`, `<area>`
`sidebar` Non-standard	Indicates that the hyperlink leads to a resource that would be better suited for a secondary browsing context, like a sidebar. Browsers, that don't have such a context will ignore this keyword. While once part of the HTML specification, this has been removed from the spec and is only implemented by Firefox at this time.	`<a>`, `<area>`, `<link>`	Нет
`tag`	Indicates that the hyperlink refers to a document describing a tag that applies to this document. Note: This link type should not be set on links to a member of a tag cloud as these do not apply to a single document but to a set of pages.	`<a>`, `<area>`	`<link>`
`up`	Indicates that the page is part of a hierarchical structure and that the hyperlink leads to the higher level resource of that structure. The number of `up` link types indicates the depth difference between the current page and the linked resource.	`<a>`, `<area>`, `<link>`	Нет