ATTRIBUTES_CORE = {
          'occi.core.id' => ->(ary) { "compute_#{ary.last['ID']}_disk_#{ary.first['DISK_ID']}" },
          'occi.core.title' => ->(ary) { "DISK #{ary.first['DISK_ID']} for compute #{ary.last['ID']}" },
          'occi.core.source' => ->(ary) { URI.parse("/compute/#{ary.last['ID']}") },
          'occi.core.target' => ->(ary) { URI.parse("/storage/#{ary.first['IMAGE_ID']}") }