What is Drupal? Magic.. ..best described as a combination of a Content Management System and a Content Management Framework.
What is Magento? a professional open-source ecommerce solution offering unprecedented flexibility and control.
Integration benefits? Magento integration with Drupal would provide a perfect blend of powerful, flexible ecommerce and content management system. Drupal sites could take ecommerce to a whole new level, while offering much better ecommerce options of Magento.
The Interaction Interaction of these two systems is performed via XML-RPC protocol. An interchange is implemented in both directions. From Drupal side it's a procedure calling for information of catalog, products, etc. from Magento. From Magento side it's an XML-RPC method calling for the purpose of notification about events, happened within Magento system.
XML-RPC XML-RPC Directory Specifications Implementations Services Blogging APIs Communities Tutorials/Press It's a spec and a set of implementations that allow software running on disparate operating systems, running in different environments to make procedure calls over the Internet. It's remote procedure calling using HTTP as the transport and XML as the encoding. XML-RPC is designed to be as simple as possible, while allowing complex data structures to be transmitted, processed and returned.