Result of calling CTFontCopyFeatures on the system font in iOS 9 beta 5

iOS 9 system font properties.json

[
  {
    "CTFeatureTypeIdentifier" : 0,
    "CTFeatureTypeName" : "All Typographic Features",
    "CTFeatureTypeNameID" : -100,
    "CTFeatureTypeSelectors" : [
      {
        "CTFeatureSelectorDefault" : true,
        "CTFeatureSelectorName" : "On",
        "CTFeatureSelectorNameID" : -101,
        "CTFeatureSelectorIdentifier" : 0
      }
    ]
  },
  {
    "CTFeatureTypeIdentifier" : 6,
    "CTFeatureTypeName" : "Number Spacing",
    "CTFeatureTypeNameID" : -700,
    "CTFeatureTypeExclusive" : true,
    "CTFeatureTypeSelectors" : [
      {
        "CTFeatureSelectorNameID" : -701,
        "CTFeatureSelectorIdentifier" : 0,
        "CTFeatureSelectorName" : "Monospaced Numbers"
      },
      {
        "CTFeatureSelectorNameID" : -702,
        "CTFeatureSelectorIdentifier" : 1,
        "CTFeatureSelectorName" : "Proportional Numbers"
      },
      {
        "CTFeatureSelectorDefault" : true,
        "CTFeatureSelectorName" : "No Change",
        "CTFeatureSelectorNameID" : -705,
        "CTFeatureSelectorIdentifier" : 4
      }
    ]
  },
  {
    "CTFeatureTypeIdentifier" : 10,
    "CTFeatureTypeName" : "Vertical Position",
    "CTFeatureTypeNameID" : -1100,
    "CTFeatureTypeExclusive" : true,
    "CTFeatureTypeSelectors" : [
      {
        "CTFeatureSelectorDefault" : true,
        "CTFeatureSelectorName" : "Normal Vertical Position",
        "CTFeatureSelectorNameID" : -1101,
        "CTFeatureSelectorIdentifier" : 0
      },
      {
        "CTFeatureSelectorNameID" : -1102,
        "CTFeatureSelectorIdentifier" : 1,
        "CTFeatureSelectorName" : "Superiors\/Superscripts"
      },
      {
        "CTFeatureSelectorNameID" : -1103,
        "CTFeatureSelectorIdentifier" : 2,
        "CTFeatureSelectorName" : "Inferiors\/Subscripts"
      }
    ]
  },
  {
    "CTFeatureTypeIdentifier" : 11,
    "CTFeatureTypeName" : "Contextual Fractional Forms",
    "CTFeatureTypeNameID" : -1200,
    "CTFeatureTypeSelectors" : [
      {
        "CTFeatureSelectorNameID" : -1203,
        "CTFeatureSelectorIdentifier" : 2,
        "CTFeatureSelectorName" : "On"
      }
    ]
  },
  {
    "CTFeatureTypeIdentifier" : 22,
    "CTFeatureTypeName" : "Text Spacing",
    "CTFeatureTypeNameID" : -2300,
    "CTFeatureTypeExclusive" : true,
    "CTFeatureTypeSelectors" : [
      {
        "CTFeatureSelectorDefault" : true,
        "CTFeatureSelectorName" : "No Change",
        "CTFeatureSelectorNameID" : -2308,
        "CTFeatureSelectorIdentifier" : 7
      },
      {
        "CTFeatureSelectorNameID" : -2309,
        "CTFeatureSelectorIdentifier" : 8,
        "CTFeatureSelectorName" : "No Kerning"
      }
    ]
  },
  {
    "CTFeatureTypeIdentifier" : 33,
    "CTFeatureTypeName" : "Case-Sensitive Layout",
    "CTFeatureTypeNameID" : -3400,
    "CTFeatureTypeSelectors" : [
      {
        "CTFeatureSelectorNameID" : -3401,
        "CTFeatureSelectorIdentifier" : 0,
        "CTFeatureSelectorName" : "Capital Forms"
      }
    ]
  },
  {
    "CTFeatureTypeIdentifier" : 35,
    "CTFeatureTypeName" : "Alternative Stylistic Sets",
    "CTFeatureTypeNameID" : -3600,
    "CTFeatureTypeSelectors" : [
      {
        "CTFeatureSelectorNameID" : 256,
        "CTFeatureSelectorIdentifier" : 2
      },
      {
        "CTFeatureSelectorNameID" : 257,
        "CTFeatureSelectorIdentifier" : 4
      },
      {
        "CTFeatureSelectorNameID" : 258,
        "CTFeatureSelectorIdentifier" : 6
      },
      {
        "CTFeatureSelectorNameID" : 259,
        "CTFeatureSelectorIdentifier" : 8
      }
    ]
  },
  {
    "CTFeatureTypeIdentifier" : 36,
    "CTFeatureTypeName" : "Contextual Alternates",
    "CTFeatureTypeNameID" : -3700,
    "CTFeatureTypeSelectors" : [
      {
        "CTFeatureSelectorDefault" : true,
        "CTFeatureSelectorName" : "Contextual Alternates",
        "CTFeatureSelectorNameID" : -3701,
        "CTFeatureSelectorIdentifier" : 0
      }
    ]
  },
  {
    "CTFeatureTypeIdentifier" : 37,
    "CTFeatureTypeName" : "Lower Case",
    "CTFeatureTypeNameID" : -3800,
    "CTFeatureTypeExclusive" : true,
    "CTFeatureTypeSelectors" : [
      {
        "CTFeatureSelectorDefault" : true,
        "CTFeatureSelectorName" : "No Change",
        "CTFeatureSelectorNameID" : -3801,
        "CTFeatureSelectorIdentifier" : 0
      },
      {
        "CTFeatureSelectorNameID" : -3802,
        "CTFeatureSelectorIdentifier" : 1,
        "CTFeatureSelectorName" : "Small Capitals"
      }
    ]
  },
  {
    "CTFeatureTypeIdentifier" : 38,
    "CTFeatureTypeName" : "Upper Case",
    "CTFeatureTypeNameID" : -3900,
    "CTFeatureTypeExclusive" : true,
    "CTFeatureTypeSelectors" : [
      {
        "CTFeatureSelectorDefault" : true,
        "CTFeatureSelectorName" : "No Change",
        "CTFeatureSelectorNameID" : -3901,
        "CTFeatureSelectorIdentifier" : 0
      },
      {
        "CTFeatureSelectorNameID" : -3902,
        "CTFeatureSelectorIdentifier" : 1,
        "CTFeatureSelectorName" : "Small Capitals"
      }
    ]
  }
]