Abstract: Disclosed is a web page development system and method utilizing a common data core (vertical structure and correlated trees for representing web pages) to generate virtual applications based upon the user's interaction, environment (log in IP, stated location, type of device, type of bandwidth, etc.), and pre-set configuration/rights. The present invention provides a multi-stage processing pipeline with data components at the input end and generated web pages at the output end. Different processing engines act at specific stages in the pipeline. These engines provide the functionalities needed in a web application and include security, localization/personalization, page templating and caching. An asynchronous engine enables limiting of processing to only certain (pertinent) portions of a web page. A static adaptation engine integrates dynamic behavior (functionalities) into static web pages. An assembly member assembles a requested web page based on output from the engines.