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Drupal 7 Module Development by Ken Rickard, John Wilkins, Larry Garfield, Matt Butcher, Greg Dunlap, Matt Farina

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Chapter 3. Drupal's Theme Layer

The most obvious part of Drupal's theming system is the Appearance page, which lists all of the themes installed on your website. When you choose a theme from the Appearance admin page, you are applying a specific graphic design to your website's data and functionality. However, the applied theme is in reality only a small part of the entire theming layer.

Drupal's Theme Layer

This book is mostly focused on building modules that encapsulate discrete chunks of functionality. However, since we're ultimately building a web application, everything outputted by your functionality will need to be marked up with HTML. Drupal calls the process ...

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