Which property is not defined within a section's schemas tags?

In Shopify theme development, the schema tags within a section are used to define settings that influence the behavior and appearance of that section. The properties that are typically defined in a section’s schema include:

• Name: This is the identifier for a section and is used in the theme editor to display the section name to merchants.
• Settings: These are the customizable options available for a section. Each setting can define different types of input fields, like text inputs, color pickers, or image uploads, allowing merchants to personalize the section.
• Presets: These allow for the section to have pre-configured settings, making it easier for merchants to select a section with specific attributes already set.

The property that is not part of this schema is the class. While developers might assign classes to HTML elements for styling purposes, they are not defined within the section’s schema tags. Therefore, class is used mainly in the code for CSS purposes rather than a property that influences a section's customizable features in the Shopify theme editor. This clear distinction solidifies why class is not part of the defined properties in a section’s schemas.