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The rel="alternate" hreflang="x" link attribute is a HTML meta element described in RFC 5988. Hreflang specifies the language and optional geographic restrictions for a document. Hreflang is interpreted by search engines and can be used by webmasters to clarify the lingual and geographical targeting of a website.== Purpose == Many websites are targeted at audience with different languages and localized for different countries. This can cause a lot of duplicate content or near duplicate content, as well as targeting issues with users from search engines. Search engines use hreflang to understand the lingual and geographical targeting of websites and use the information to show the right URL in search results, depending on user language and region preference. There are 3 basic scenarios that can be covered with hreflang: * Same country, different languages * Different countries, different languages * Different countries, same language 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hreflang」の詳細全文を読む スポンサード リンク
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