Method of providing user interface

Apparatus, methods, and articles of manufacture consistent with the present invention provide a user interface for data processing systems wherein occlusion glyph code tilings (21) are used to facilitate the accurate extraction of user selection information from a substrate while presenting user interface graphics to the user. The tiled code system in the present invention is comprised of tiles, with tiled code regions and occlusion regions (M Occlusion). In one embodiment, a first tiled code system facilitates robust decoding of the substrate with a suitable image capture. The occlusions are comprised of user interface graphics for user selection and information, such as glyphs encoding a second code system. The occlusion regions occur periodically in each tile. The tiled code pattern can be used to implement a graphical user interface. A user uses a selection device to capture an image of a portion of the substrate that includes portions of tiled codes to complete a tile. The image is analyzed to determine the tile code pattern. A context code is determined from the tiled code pattern, and a selection code is determined from the occlusion information in the image. The context code and selection code are then processed by a syntax processor. Based on a selection or series of selections by a user, the syntax processor sends commands to the system.