The standard, now referred to informally as C11, provides greater compatibility with the C++ language and adds new features to C (as indicated in the draft).

Those features include multi-threading, Unicode support based on the ISO/IEC TR 19769:2004 specification, additional macros for querying the characteristics of floating point types and the ability to use static assertions. The recently released revision also standardises many of the features that current compilers already support, as required by the draft.