Hi all, I managed to implement large portion of YAML grammar (hopefully most of the tricky parts) because of my research project. If anyone is interested in YAML grammar, let me know or have a look at: http://smalltalkhub.com/#!/~JanKurs/PetitParser/packages/PetitYAML I am pretty sure, it is not far from being finished, tests are of course included. Cheers, Jan