The process by which one gives structure to an rdf graph by adding a RelaxNg grammar to the rdf/xml in order to make it easier for xml tools to parse. This term was first coined in the blog post Crystalizing RDF
Tips and tricks
It would be good to develop recipes for how to do this easily.
Questions
How does one make it clear that a rdf/xml file is crystalised? One can do it by using a mime type as RSS1.1 and RSS1.0 do it.
Tools
RDFT is a template language to help specify crystalisations of rdf graphs. The crystalisations can be towards rdf/xml or any xml.