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    { "id" : "http://dbpedia.org/resource/Soliton_(optics)"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "In optics, the term soliton is used to refer to any optical field that does not change during propagation because of a delicate balance between nonlinear and linear effects in the medium. There are two main kinds of solitons: spatial solitons: the nonlinear effect can balance the diffraction. The electromagnetic field can change the refractive index of the medium while propagating, thus creating a structure similar to a graded-index fibre." ] ,
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        "http://dbpedia.org/ontology/thumbnail" : [ "http://commons.wikimedia.org/wiki/Special:FilePath/Soliton_lens_equivalent.svg?width=300"] } } }
