Pen-Based user interface (Pen UI) is a primary style in Post-WIMP world. Two kinds of participants including the HCI designers and the user designers are involved in the development cycle of Pen UI. It is crucial to catch users intention and accomplish the linkage between presentation and control of interaction information. According to the two dimensions, OICM (orthogonal interaction information architecture coordinate model) is developed. This model is described from four quadrants including problem domain knowledge, task information, rule collection, and context linkage. The main ideas and features of OICM are declared in detail, especially the implementation method based on XML technique. Eventually, a component-oriented UI platform built on this model and some relevant systems are introduced.