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. The WebTV interface uses this information to prefetch the next page, storing its content in memory for a fast transition to the page when the viewer does select the link. Prev Refers to the previous document in an ordered series of documents.
Section Refers to a document serving as a section in a collection of documents.
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. Stylesheet Refers to an external style sheet. See the section on external style sheets for details. Subsection Refers to a document serving as a subsection in a collection of documents.