def decimal_to_dot(x_dec):
    """Test if `Decimal` value has enough precision that it is defined to dot,
    i.e., its eps is <= 1.

    Parameters
    ----------
    x_dec : Decimal
        Input value in decimal.

    Returns
    -------
    y : bool
        True if `x_dec` defined to dot.

    Examples
    --------
    >>> decimal_to_dot(Decimal('1.23E+1'))
    True
    >>> decimal_to_dot(Decimal('1.23E+2'))
    True
    >>> decimal_to_dot(Decimal('1.23E+3'))
    False
    """
    y = x_dec.is_finite() and (x_dec.as_tuple().exponent <= 0)
    return y