Release Date: 2018-04-01

Level Code Display Definition
1 alternate alternate Designates substitute versions for the document in which the link occurs. When used together with the lang attribute, it implies a translated version of the document. When used together with the media attribute, it implies a version designed for a different medium (or media).
1 appendix appendix Refers to a document serving as an appendix in a collection of documents.
1 bookmark bookmark Refers to a bookmark. A bookmark is a link to a key entry point within an extended document. The title attribute may be used, for example, to label the bookmark. Note that several bookmarks may be defined in each document.
1 chapter chapter Refers to a document serving as a chapter in a collection of documents.
1 contents contents Refers to a document serving as a table of contents. Some user agents also support the synonym ToC (from "Table of Contents").
1 copyright copyright Refers to a copyright statement for the current document.
1 glossary glossary Refers to a document providing a glossary of terms that pertain to the current document.
1 help help Refers to a document offering help (more information, links to other sources of information, etc.).
1 index index Refers to a document providing an index for the current document.
1 next next Refers to the next document in a linear sequence of documents. User agents may choose to preload the "next" document, to reduce the perceived load time.
1 prev prev Refers to the previous document in an ordered series of documents. Some user agents also support the synonym "Previous".
1 section section Refers to a document serving as a section in a collection of documents.
1 start start Refers to the first document in a collection of documents. This link type tells search engines which document is considered by the author to be the starting point of the collection.
1 stylesheet stylesheet Refers to an external style sheet. See the section on external style sheets for details. This is used together with the link type "Alternate" for user-selectable alternate style sheets.
1 subsection subsection Refers to a document serving as a subsection in a collection of documents.