HTML Standard

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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