librdfa is a pure C implementation of a standards-compliant RDFa parser. The library is quite easy to use (there are only 5 functions). librdfa is stream-based (very little memory usage), very small (the library is around 19KB) and fast.
The C-library is available for the following types of systems:
There are also language bindings for the following languages:
You can download the source using git: git clone http://rdfa.digitalbazaar.com/librdfa.git
librdfa is licensed under the GNU Lesser General Public License v2.1 (or newer), GNU General Public License v2.0 (or newer), or the Apache 2.0 License (or newer). Each license is an alternative, and if you select one license, that one alone applies.