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Technical implementation · Technical SEO

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Definition

Markup validation is the process of testing structured data implementation using tools like Google’s Rich Results Test and Schema.org validator to confirm it is correctly formatted, error-free, and eligible for rich results. Validation identifies missing required properties, incorrect types, and syntax errors. Invalid structured data provides no entity signal benefit. Schema markup with errors may be partially parsed — or ignored entirely — by AI crawlers. Markup validation is the quality control step that ensures schema implementation is actually communicating the intended entity information. For brands implementing Organization schema, LocalBusiness schema, or FAQ schema, validation before deployment prevents silent failures where schema exists in the HTML but is not being processed.

Schema markup

Rich Results Test

Structured data

JSON-LD

Rich result

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