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. Chapter Refers to a document serving as a chapter in a collection of documents.
Contents Refers to a document serving as a table of contents.
Copyright Refers to a copyright statement for the current document. Glossary Refers to a document providing a glossary of terms that pertain to the current document. Index Refers to a document providing an index for the current document. Next Refers to the next document in an linear sequence of documents. The WebTV browsers supports this value.