Fill in the blanks: ______ is the manual method where you add in-line schema annotations to the corresponding HTML page elements. When you use ______, Javascript fires and inserts the markup into the head of the page.

Microdata markup is an older method of adding schema directly within the HTML, annotating existing elements. This requires careful integration into the page's structure. JSON-LD (JavaScript Object Notation for Linked Data) is a more modern and recommended method. It uses JavaScript to dynamically inject the structured data into the HTML document's head, separating the schema from the visible content and making it easier to implement and maintain. Schema.org is a vocabulary used by all these methods, not a method itself.