HOOD Framework stands for Hypertext Object Oriented Design Framework and in Hypertext we mean PHP But not necesarly. Understanding that HOOD is more of a concept rather than a regular Framework. Yet it is (in this website) tends to PHP and includes special libraries for PHP.
Data, context and interaction (DCI) is a paradigm used in computer software to program systems of communicating objects. Its goals are:
In different to MVC (Model-View-Controller) the Object Oriented Design is modeling the real world into software coded objects and classes. Hence if you are managing employees you will have an employee class. If you want to assign an employee to a certain job, you will have a method in the employee class called assign that get a job as a parameter.
Until now it's straight forward OOP.
But MVC tries to force you on having a View and a Model, while people (programmers) tends to confuse and create a few Views mixing a view for a job and employee in the View class. In DCI concept and so on in HOOD the view and the model that relevant for the real life object co-exist in the relevant class. This way we will have on the employee class the function viewRecentJobs() or viewShortBio(). Yet we will still maintain seperation. Hence this class will also have the getRecentJobs() function. Most likely the viewRecentJobs() will call the getRecentJobs() method. This is the main idea standing behind the DCI paradigm.
By including the real life functions and method in one class and yet seperating data and view creates a much more easy to understand flow of actions generating a simple clean code that needs no comments. You're basically think how things works in real life sample and that's the way they are coded.
The controller responsabilities is to handle the requests. Talking about PHP and Web Development, the controller handles the HTTP request, or more likely called the page or RPC/JSON in RESTfull. It parse check and validate the GET or POST params, creates the objects in memory and calls the relevant functions.
HOOD Frameworks comes with a support library that holds common functionality needed for almosy any PHP Projects. Handling parameters, handling URLs, handling dates and more. For using the HOOD Framework you may use the Support Library but you are not obligated to do so.