It also shows us how a Physical World Hyperlink (PWH) can provide static and dynamic information.
The reference rates are based on the regular daily concertation procedure between central banks within and outside the European System of Central Banks, which normally takes place at 2.15 p.m. ECB time (CET).
This application provides a great illustration of how a 2d code, physical world hyperlink (PWH), can offer dynamic and static functions.
In this case, the URL is embedded in the code, it is linked to a specific site. When a cameraphone scans the 2d code, it sees http://www.ecb.int/euro.html and the browser goes to that site. The 2d code is static but it's function is dynamic. Foreign exchange rates are dynamic, constantly changing.
Physical world hyperlinks are just that. An identifier that will direct a mobile user to specific content on/through the Net. Just like a hyperlink on a website, a PWH can also be changed frequently to link to different sites.
Down the road, the 2D code will offer more of a dynamic function. A computer/server will resolve the 2d code and direct the user to various sites that can be changed without physically changing the 2d code that's already in print. What site you are directed to can be determined by your location, age, sex, time of day etc.
If the European Central Bank was able to change the targeted site for various users (difft countries, languages etc) that would make the 2d code dynamic.
An easy way to understand it:
The 2d code has one URL embedded in it (static) but the content on the site changes (dynamic).
The 2d code can be resolved to any site(dynamic) and the site content can be static or dynamic.