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json-ld语法中@id的用途是什么?
我真的很困惑@idjson-ld语法中使用的是什么。来自apple.com的示例。@id实际代表什么。有什么帮助会很棒吗? <script type="application/ld+json"> { "@context": "http://schema.org", "@id": "http://www.apple.com/#organization", "@type": "Organization", "url": "http://www.apple.com/", "logo": "https://www.apple.com/ac/structured-data/images/knowledge_graph_logo.png?201608191052", "contactPoint": [ { "@type": "ContactPoint", "telephone": "+1-800-692-7753", "contactType": "sales", "areaServed": [ "US" ] } ], "sameAs": [ "http://www.wikidata.org/entity/Q312", "https://www.youtube.com/user/Apple", "https://www.linkedin.com/company/apple" ] }