HTML Standard4.6 Links4.6.1 Introduction4.6.2 Links created by a and area elements4.6.3 API for a and area elements4.6.4 Following hyperlinks4.6.5 Downloading resources4.6.6 Hyperlink auditing4.6.6.1 The `Ping-From` and `Ping-To` headers4.6.7 Link types4.6.7.1 Link type "alternate"4.6.7.2 Link type "author"4.6.7.3 Link type "bookmark"4.6.7.4 Link type "canonical"4.6.7.5 Link type "dns-prefetch"4.6.7.6 Link typ
