Anything To Triples (any23) is a library, a web service and a command line tool that extracts structured data in RDF format from a variety of Web documents.
Christian Bizer, Kai Eckert, Robert Meusel1, Hannes Mühleisen, Michael Schuhmacher1, and Johanna Völker1
Deployment of RDFa, Microdata, and Microformats on
the Web – A Quantitative Analysis
Linked Data in Use Track - ISWC 2013
This specification defines the HTML microdata mechanism. This mechanism allows machine-readable data to be embedded in HTML documents in an easy-to-write manner, with an unambiguous parsing model. It is compatible with numerous other data formats including RDF and JSON.
RDF Translator is a multi-format conversion tool for structured markup. It provides translations between data formats ranging from RDF/XML to RDFa or Microdata. The service allows for conversions triggered either by URI or by direct text input. Furthermore it comes with a straightforward REST API for developers.