for _, segment := range strings.Split(value, "/") {
		if segment == "." || segment == ".." {
			return &ErrInvalidFilterValue{value}
		}
	}

	if len(value) <= 1024 && utf8.ValidString(value) && !strings.Contains(value, `\`) {
		return nil
	}

	return &ErrInvalidFilterValue{value}
}

// FilterRule - represents elements inside <FilterRule>...</FilterRule>
type FilterRule struct {