Completa los espacios en blanco: ______ es el método manual mediante el cual se añaden anotaciones de esquema en línea a los elementos correspondientes de la página HTML. Cuando se utiliza ______, Javascript activa e inserta el marcado en el encabezado de la página.

The correct answer is "Marcado de microdatos, JSON-LD" (Microdata markup, JSON-LD). Microdata is a manual method for adding inline schema annotations directly to HTML elements. This means you embed the structured data within the existing HTML tags. JSON-LD (JavaScript Object Notation for Linked Data), on the other hand, uses JavaScript to dynamically inject and activate the structured data markup, typically placed in a script tag within the head or body of the HTML document. Incorrect options: "Schema.org" is a vocabulary, not a method for implementation. Both Microdata and JSON-LD use the Schema.org vocabulary. The other options incorrectly swap the positions of Microdata and JSON-LD, or incorrectly pair them with Schema.org as an implementation method.