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Technical implementation · Structured Data

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Definition

Microdata is an HTML specification for embedding structured data within page content using HTML tag attributes — one of three formats supported by Google for structured data, alongside JSON-LD and RDFa. Unlike JSON-LD, microdata is embedded inline within the page’s visible HTML content. Microdata is a legacy structured data format that Google continues to support but no longer recommends — JSON-LD is the preferred implementation. Brands using microdata for structured data should consider migrating to JSON-LD, which is easier to implement, maintain, and validate. The entity signal value of correctly implemented microdata is equivalent to JSON-LD, but the maintenance overhead is higher and error-checking tools are less robust.

JSON-LD

RDFa

Structured data

Schema markup

Schema.org

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