bufr/src/main/java/ucar/nc2/iosp/bufr/tables/TableA.java
static public String getDataCategory(int cat) {
    if (tableA == null) init();
    String result = tableA.get(cat);
    return result != null ? result : "Unknown category=" + cat;
  }
static public String getDataCategory(int cat) {
    if (tableA == null) init();
    String result = tableA.get(cat);
    return result != null ? result : "Unknown category=" + cat;
  }
data category name, from table A

@param cat data category
@return category name, or null if not found