This is a very first prototype of an introspection framework for GObject. 

The metadata format is described in metadata-format.txt, the XML IDL format 
follows the DTD in gidl.dtd. Look at the files in tests/ for IDL examples. 

The code in src/ currently produces three things:
- g-idl-compile, a metadata compiler. It converts one or more IDL files 
  into one or more metadata blobs. It can either emit the raw metadata 
  blob (--raw) or C code (--code). 
- libirepository, the repository API. 
- g-idl-generate, an IDL generator, using the repository API. It generates
  IDL files from binary metadata which can be in a shared object, or a raw
  metadata blob (--raw). 

There are a number of IDL test files in test/, and a script to do
roundtrip tests (IDL -> binary -> IDL).
 
The introspection framework needs a lot more work, see TODO.