[1] App Indexing for Google Search — Google Developers ( (2013-10-31 15:05:25 +09:00 版)) https://developers.google.com/app-indexing/webmasters/details

[2] Google 検索用 App Indexing — Google Developers (2014-08-14 05:48:11 +09:00 版) https://developers.google.com/app-indexing/webmasters/server?hl=ja

<link rel="alternate" href="android-app://com.example.android/http/example.com/gizmos" />