bufr/src/main/java/ucar/nc2/iosp/bufr/Descriptor.java
static public boolean isBufrTable(short fxy) {
    int f = (fxy & 0xC000) >> 14;
    int x = (fxy & 0x3F00) >> 8;
    int y = (fxy & 0xFF);
    return (f == 0) && (x == 0) && (y < 13);
  }
static public boolean isBufrTable(short fxy) {
    int f = (fxy & 0xC000) >> 14;
    int x = (fxy & 0x3F00) >> 8;
    int y = (fxy & 0xFF);
    return (f == 0) && (x == 0) && (y < 13);
  }
contains a BUFR table entry