private static final class Resources {
    // formats
    private static final Format ps =
        PackageWriter.getFormat(
            "https://raw.github.com/nicholasdelrio/visko/master/resources/formats/POSTSCRIPT.owl#POSTSCRIPT");
    private static final Format netCDF =
        PackageWriter.getFormat(
            "https://raw.github.com/nicholasdelrio/visko/master/resources/formats/NETCDF.owl#NETCDF");
    private static final Format spaceSeparatedValues =
        PackageWriter.getFormat(
            "https://raw.github.com/nicholasdelrio/visko/master/resources/formats/SPACESEPARATEDVALUES.owl#SPACESEPARATEDVALUES");
    private static final Format esriGridded =
        PackageWriter.getFormat(
            "https://raw.github.com/nicholasdelrio/visko/master/resources/formats/ESRIGRID.owl#ESRIGRID");

    // semantic type uris
    private static final OntResource gravityData =
        PackageWriter.getDataType(
            "http://rio.cs.utep.edu/ciserver/ciprojects/CrustalModeling/CrustalModeling.owl#d19");
    private static final OntResource griddedGravityData =
        PackageWriter.getDataType(
            "http://rio.cs.utep.edu/ciserver/ciprojects/CrustalModeling/CrustalModeling.owl#d12");

    // views
    private static final VisualizationAbstraction contourMap2D =
        PackageWriter.getView(ViskoV.INDIVIDUAL_URI_2D_ContourMap);
    private static final VisualizationAbstraction rasterMap2D =
        PackageWriter.getView(ViskoV.INDIVIDUAL_URI_2D_RasterMap);
    private static final VisualizationAbstraction pointMap2D =
        PackageWriter.getView(ViskoV.INDIVIDUAL_URI_2D_PointMap);
    private static final VisualizationAbstraction barchart3D =
        PackageWriter.getView(ViskoV.INDIVIDUAL_URI_3D_BarChart);

    // data types
    private static final OntResource xyzData =
        PackageWriter.getDataType(
            "http://rio.cs.utep.edu/ciserver/ciprojects/CrustalModeling/CrustalModeling.owl#d18");
    private static final OntResource fieldTrmmedGravityData =
        PackageWriter.getDataType(
            "http://rio.cs.utep.edu/ciserver/ciprojects/CrustalModeling/CrustalModeling.owl#FieldTrimmedGravityData");
    private static final OntResource COARDS_2D_Grid =
        PackageWriter.getDataType("http://gmt.soest.hawaii.edu/gmt-data.owl#2D_Grid_COARDS");
  }
 private static final class Resources {
   // formats
   private static final Format gif =
       PackageWriter.getFormat(
           "https://raw.github.com/nicholasdelrio/visko/master/resources/formats/GIF.owl#GIF");
   private static final Format png =
       PackageWriter.getFormat(
           "https://raw.github.com/nicholasdelrio/visko/master/resources/formats/PNG.owl#PNG");
   private static final Format jpeg =
       PackageWriter.getFormat(
           "https://raw.github.com/nicholasdelrio/visko/master/resources/formats/JPEG.owl#JPEG");
   private static final Format dicom =
       PackageWriter.getFormat(
           "https://raw.github.com/nicholasdelrio/visko/master/resources/formats/DICOM.owl#DICOM");
   private static final Format tiff =
       PackageWriter.getFormat(
           "https://raw.github.com/nicholasdelrio/visko/master/resources/formats/TIFF.owl#TIFF");
   private static final Format fits =
       PackageWriter.getFormat(
           "https://raw.github.com/nicholasdelrio/visko/master/resources/formats/FITS.owl#FITS");
   private static final Format raw =
       PackageWriter.getFormat(
           "https://raw.github.com/nicholasdelrio/visko/master/resources/formats/RAW.owl#RAW");
   private static final Format stf =
       PackageWriter.getFormat(
           "https://raw.github.com/nicholasdelrio/visko/master/resources/formats/VNDWTSTF.owl#VNDWTSTF");
   private static final Format pdf =
       PackageWriter.getFormat(
           "https://raw.github.com/nicholasdelrio/visko/master/resources/formats/PDF.owl#PDF");
   private static final Format plain =
       PackageWriter.getFormat(
           "https://raw.github.com/nicholasdelrio/visko/master/resources/formats/PLAIN.owl#PLAIN");
   private static final Format plainText =
       PackageWriter.getFormat(
           "https://raw.github.com/nicholasdelrio/visko/master/resources/formats/PLAINTEXT.owl#PLAINTEXT");
   private static final Format latex =
       PackageWriter.getFormat(
           "https://raw.github.com/nicholasdelrio/visko/master/resources/formats/VNDLATEXZ.owl#VNDLATEXZ");
   private static final Format html =
       PackageWriter.getFormat(
           "https://raw.github.com/nicholasdelrio/visko/master/resources/formats/HTML.owl#HTML");
   private static final Format ps =
       PackageWriter.getFormat(
           "https://raw.github.com/nicholasdelrio/visko/master/resources/formats/POSTSCRIPT.owl#POSTSCRIPT");
 }