+ /**
+ * Sexagesimal numbers:
+ * ((ntv>>2)-0xbf) * 60^((ntv&3)+1) = (1..9)*(60^1..60^4)
+ */
+ UPROPS_NTV_BASE60_START=0x300,
+ /**
+ * Fraction-20 values:
+ * frac20 = ntv-0x324 = 0..0x17 -> 1|3|5|7 / 20|40|80|160|320|640
+ * numerator: num = 2*(frac20&3)+1
+ * denominator: den = 20<<(frac20>>2)
+ */
+ UPROPS_NTV_FRACTION20_START=UPROPS_NTV_BASE60_START+36, // 0x300+9*4=0x324
+ /**
+ * Fraction-32 values:
+ * frac32 = ntv-0x34c = 0..15 -> 1|3|5|7 / 32|64|128|256
+ * numerator: num = 2*(frac32&3)+1
+ * denominator: den = 32<<(frac32>>2)
+ */
+ UPROPS_NTV_FRACTION32_START=UPROPS_NTV_FRACTION20_START+24, // 0x324+6*4=0x34c
+ /** No numeric value (yet). */
+ UPROPS_NTV_RESERVED_START=UPROPS_NTV_FRACTION32_START+16, // 0x34c+4*4=0x35c