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PropertyData for May 2026

additionalProperty

Estimated domains

100K - 1M

Description

A property-value pair representing an additional characteristic of the entity, e.g. a product feature or another characteristic for which there is no matching property in schema.org.\n\nNote: Publishers should be aware that applications designed to use specific schema.org properties (e.g. https://schema.org/width, https://schema.org/color, https://schema.org/gtin13, ...) will typically expect such data to be provided using those properties, rather than using the generic property/value mechanism.

Definition from the Schema.org vocabulary (English).

Trend over time

At least two months are needed to show a trend. The series will grow with every monthly update.

Tiers indicate the number of unique domains using the term. They are intentionally approximate to reduce noise and protect site privacy. How to read the data.