Muninn publishes its data using both RDF and OWL XML markups using a Linked Open Data methodology.
Muninn makes use of OWL ontologies to markup and record different pieces of information. The ontologies are available along with their documentation here. The data can be accessed in one of two ways: If you know the specific object you are looking for you can retreive it directly from the server using the following url format: http://rdf.muninn-project.org/ww1/2011/11/11/(Object)/(Id) Or if you have a SPARQL client, you can point it to the SPARQL server at http://rdf.muninn-project.org/sparql.
The Geotagged data within Muninn is also made available through a GeoRSS and KML feed.