What are the maximum and minimum range standards for the rating values in the Review Schema?

When using Review Schema markup for review content, the range standard for rating values is defined by the Schema.org specification and typically needs to be clearly defined through the "worstRating" (minimum value) and "bestRating" (maximum value) properties. By default, the most common rating system is 1 (lowest) to 5 (highest), which is suitable for most product or service review scenarios. If other rating systems are adopted (such as a 10-point scale or 100-point scale), a custom range is required: - For a 10-point scale scenario: worstRating can be set to "0" or "1" and bestRating to "10", with ratingValue needing to be within the range of 0-10 or 1-10. - For a 100-point scale scenario: worstRating is usually set to "0" and bestRating to "100", with the rating value being an integer or decimal between 0 and 100. It should be noted that ratingValue must be between worstRating and bestRating, and all three must exist simultaneously to ensure proper parsing by search engines. In practical applications, it is recommended to use a structured data testing tool (such as Google's Rich Results Test) to verify that the rating range settings comply with specifications, avoiding failure to display review information correctly due to missing ranges.