ネット検索してみると、「プライバシー、固有の ID、RLZ - Google Chrome ヘルプ(http://www.google.com/support/chrome/bin/answer.py?hl=jp&answer=107684)」というドキュメントを見つけたけど、アクセスログを見る限りGoogle Chromeだけがrlzパラメータを使っているわけではなく、もっと拡大してGoogleツールバーなどGoogle系支援ツールもつけているんじゃないだろうかと思えてきた。
それ以上は何もわからないので、最近アクセス数がすごかったある日の日記のアクセスログからrlzパラメータを抽出してみることにする。
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