The Open Semantic Framework (OSF) for Drupal is a middleware layer that allows structured data (RDF) and associated vocabularies (ontologies) to "drive" tailored tools and data displays within Drupal. The basic OSF for Drupal modules provide two types of capabilities. First, there are a series of connector modules such as OSF Entities, OSF SearchAPI, OSF Field Storage and OSF Views to integrate an OSF instance into Drupal's core APIs. Second, there is a series of module tools used to administer all of these capabilities.
By using OSF for Drupal, you may create, read, update and delete any kind of content in a OSF instance. You may also search, browse, import and export structured datasets from an OSF instance.
OSF for Drupal connects to the underlying structured (RDF) data via the separately available OSF Web services. OSF Web Services is a mostly RESTful Web services layer that also allows multiple Drupal installations to share and collaborate structured data with one another via user access rights and privileges to registered datasets. Collaboration networks may be established directly to distributed OSF Web Services servers, also allowing non-Drupal installations to participate in the network.