1) The document discusses integrating files into Drupal 7's authoring workflow using various contrib modules like Media, File Entity, and Rabbit Hole as well as some custom modules.
2) It describes how Media provides a framework for handling files while File Entity adds entities for files and File Entity Revisions allows file entities to have revisions.
3) The author demonstrates how these modules work together with Rabbit Hole and custom modules to allow fielding, revising, and inserting files into the WYSIWYG editor.
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