{ "items" : [
    { "id" : "http://dbpedia.org/resource/Screw_axis"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "A screw axis (helical axis or twist axis) is a line that is simultaneously the axis of rotation and the line along which translation of a body occurs.  Chasles' theorem shows that each Euclidean displacement in three-dimensional space has a screw axis, and the displacement can be decomposed into a rotation about and a slide along this screw axis.Plücker coordinates are used to locate a screw axis in space, and consist of a pair of three-dimensional vectors." ] ,
        "http://xmlns.com/foaf/0.1/depiction" : [ "http://commons.wikimedia.org/wiki/Special:FilePath/Pure_screw.svg" ] ,
        "http://dbpedia.org/ontology/thumbnail" : [ "http://commons.wikimedia.org/wiki/Special:FilePath/Pure_screw.svg?width=300"] } } }
