Abstract Shortcodes class is by other products to help with shortcodes implementation. This class has different features that can help with basic attributes for shortcodes, handle functions calls for rendering and to handle access limitation based on user roles and capabilities. Products using gdr2_Shortcodes xScape Theme Framework (from 1.8.3, with access control) GD Custom Posts [...]
gdT3 templates system uses mix of HTML, CSS, PHP and special markup template tags to extra data into the rendered output. Depending on the tag, they can have different structure and settings to control display. This tutorial explains the structure of the special tags in gdT3.