Rel Attribute Analysis in HTML _ HTML/Xhtml _ webpage Creation

This article mainly introduces the rel Attribute Analysis in HTML. For more information, see

I found that some of my colleagues broadcasted this article on Weibo and added it to my favorites. So I will review this article on casual translation. Later I found that w3cschools.com.cn already has a Chinese translation, so here I will continue to improve this article to make it more valuable. I first thought of translating this document from idea.

Example

Connections with rel attributes:

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Browser support

Rel attributes are supported in all mainstream browsers

Note:This attribute is ignored during browser rendering, but the search engine can obtain more information from it (the tag is only valid when the href attribute exists ).

Definition and use

The rel attribute specifies the relationship between the current document and the connected document.

Syntax

Differences between HTML 4.01 and HTML 5

Deleted Values: appendix, chapter, contents, copyright, glossary,Index, Section, start, subsection.

New Values: archives, author, bookmark, external, first,Index, Last, license, nofollow, noreferrer, search, sidebar, tag, up.

Attribute Value

Value	Description	Scenario | example	HTML4.01	HTML5
Appendix	Link to the document Appendix
Alternate	Link to an alternative source (for example, print pages, translations, and images)	Configure the atom and feed of the website in the head label.
Shortcut icon	Small shortcut icon	Specify the title bar, address bar, and favorites bar icons
Archives	Link to the document set or historical data
Author	Author of the link	Author of the declarative document in the head label
Canonical	Authoritative, exemplary	Let the search engine know which page the webmaster wants to capture and include in the duplicate or similar web pages of the current website The canonical attribute value usually appears in the rel attribute. URL: http://www.xxoo.com/xhtml/rel_canonical/ Canonical can be considered as a secondary feature of 301 permanent redirection. Canonical can be used with relative or absolute links, but absolute links are recommended. Google defines canonical as the first choice for a set of highly similar webpages. Canonical: Meaning of Chinese "model"
Stylesheet	Document external style sheets
Home	Home Page
First	Link to the first document in the Set
Start	Link to the first page of the current document
Next	Link to the next document in the Set
Prev	Link to the previous document in the Set
Last	Link to the final document in the collection
Up	Provides a link to a document. This document provides the context of the current document
Search	Search Tools linked to documents
Sidebar	Link to the document that should be displayed in the browser sidebar
Contents	Link to the content directory of the current document	It is usually placed on the main content bar of the document to facilitate jump between topics on the current page
Index	Index linked to the current document
Glossary	Link to the glossary of the current document
Copyright	Link to the copyright or privacy page of the current document	Website bottom Copyright
Chapter	Link from the current document to a chapter
Section	Link to a section in the document list
Subsection	Link to the sub-section in the current document list. (A section can have multiple sub-sections .)
Head	Link to the top-level document in the Set
Toc	Directory linked to the set
Parent	Link to the source document
Child	Link to the document below the source
Help	Link to help document
Bookmark	Used as a permanent URL for bookmarks	List title
External	Link to external document	External Connection referenced in the article
Nofollow	Link to unauthorized documents, such as paid links Google uses "nofollow" to ensure that its search Spider does not track the link	Related Articles on the site, random articles on the site, comments and replies, comments, views, and author links on the list and article pages, comment addresses on the sidebar, and the "Homepage" link in the homepage navigation bar, most comments and most visits
Noreferrer	Requires that the browser should not send an HTTP referer header when the user follows the hyperlink
License	Copyright information linked to the document
Tag	Current document tag (keyword)	Tag Cloud in the sidebar, tag in the article, tag in the list, and tag in the tab
Friend	Sponsorship	Link, themes by at the bottom

Due to my limited level, it is inevitable that there will be some errors. If you find anything inappropriate or need to be supplemented, please leave a message and point out, thank you!

Reference

Http://www.w3schools.com/TAGS/att_a_rel.asp

Http://vanessa.b3log.org/research-a-rel-value

Http://www.w3school.com.cn/htmldom/prop_anchor_rel.asp

I have to mention the rel-author label.

HTML rel canonical Attribute Value

Description of link label rel attributes

Rel = "canonical" (google webmaster tool)