For RDF models, I have to re-read the RDF-related W3C recommendations, especially the RDF concepts and abstract syntax.

For file RDF query language, I should read the SPARQL. Although maybe I use query language different from SPARQL, I think the query language is base on SPARQL.

For file-base RDF database, I must read the source of Jena and LongWell to get an overview how to implement such database.

For RDF stylesheet language transformation, I should read the source of Xalan and Xerces and Velocity and also XUL to get the overview.

Lots of new technologies must be learned before I can design my RDF-based wHizz Notes.