1. 3 Semantics, structure, and APIs of HTML documents
    1. 3.1 Documents
    1. 3.2 Elements
      1. 3.2.1 Semantics
      2. 3.2.2 Elements in the DOM
      3. 3.2.3 HTML element constructors
      4. 3.2.4 Element definitions

      3.1 Documents

      Every XML and HTML document in an HTML UA is represented by a Document object. [DOM]

      Interactive user agents typically expose the Document object's URL in their user interface. This is the primary mechanism by which a user can tell if a site is attempting to impersonate another.

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