One of the hallmarks of the FLOSS philosophy is its reliance upon open standards.
There are many bodies which produce official standards: OSI, ITU, ETSI, IEEE, and so on.
The standards most software developers will be familiar with are those which define programming languages such as
C++. But they touch many other things as well (such as ISO/IEC 14496, better known as MPEG-4).
The standards are certainly 'freely available' in that anyone can purchase a copy - though they are often quite expensive. But are they necessarily open standards?
MPEG-4 is a prime example, as it is burdened with issues surrounding patents.
Are there other examples of such burdened standards? How does a FLOSS developer deal with this in providing an implementation of them?