public boolean isOperand(String token) {
		if (operands.containsKey(token.toLowerCase())) {
			return true;
		}

		int length = token.length();
		if (length > 0) {
			for (int i = 0; i < length; i++) {
				char c = token.charAt(i);
				if (c <= '/' || c >= ':') {  // Test to see if it is an ascii
					return false;
				}
			}
		}

		return true;
	}