AutoMeta

AutoMeta (automatic meta data annotation) is a environment for semi-automatic (or automatic) annotation and meta-annotation of documents for publishing on the Web, using the RDFa W3C recommended annotation language. It also includes an RDFa extraction tool to provide the user with a view of the annotated triples. It is available in both CLI (Command line Interface) and GUI interfaces.

link: http://code.google.com/p/autometa/

Thesis (in portuguese): http://www2.comp.ime.eb.br/dissertacoes/2011-Celso_Fontes.pdf