Semapedia is a project to link the physical world to the digital one, through the use of 2D Barcodes. 2D barcodes are placed on physical objects, and decoding a 2D Barcode with a camera phone provides a user with the Wikipedia article on that object.
There are a number of 2D barcode “formats,” each with various strengths and weaknesses, (the major three being Semacode/Datamatrix, QR Code, and ShotCode). Semacode used to be based on the Semacode method for creating and decoding 2D barcodes; but it seems that the open Datamatrix standard, upon which Semacode is based, has not been developing and innovating as fast, and has not been adopted as quickly internationally, as the Quick Response (QR) Code format, which is widely used in Japan. As a result, Semapedia is shifting towards the use of QR Codes (although Semacodes/Datamatrix will always be supported):
We have changed our 2D code base to QR codes instead of Datamatrix codes so far. Of course, all Semapedia tags generated and distributed up to now STILL WORK and will always work. We consider experimenting with QR codes an interesting new approach because they offer several extended features than Datamatrix codes. Also, the adoption of QR codes with cellphone manufacturers and scanning software providers has increased dramatically in the past 6 months. Our goal is to connect the real and the virtual in a meaningful and beautiful way. Going with QR codes from here inherits the promise to have more people being able to use Semapedia Tags much faster than if they were based on the Datamatrix standard.
With its obvious educational value, this move by Semapedia brings QR Code closer to becoming a de-facto standard for 2D Barcodes in education.
(via All About Mobile Life)