If you have prophetic dreams it means that you are prophetic in reality. You can predict the future for yourself and others. Prophetic dreams predict exactly what will happen. Dreaming of an uncle dying just before your aunt dies in reality is not a prophetic dream. Prophetic dreams can be vague but not inaccurate. Most importantly, prophetic dreams have a strong feeling associated with them that pervades the whole dream. If you have prophetic dreams you will already be aware of this feeling. Any dreams that do not have that feeling can be interpreted as per this book.
Segments of your dream can be prophetic. For instance, knowing what is going to happen next in a dream indicates you have the prophetic gift. You are using your ability in your dream because you do not use it enough in your waking state.