cocoa touch - iphone sdk - object model context design help -

I need some help to design the iPhone's core data object model reference. I have started making a golf scorecard application using XCode 4, and the way I want the app to behave ...

-User (first / last name, initial with ) Players can add

Users can add course (name, address details, holes with equal / length) - run a round so that I decide that segment at the top of the scorecard tableview Which is Will not crawl, and show More with the best score at the level of the current score for each player. In the header in the section, I want to show the hole 11: cross as 3/150 meters "and on each line I want to show the button to add the stroke, and the best score on that particular hole.
- , Add / delete, the user can also browse the round which player is ever played.

What is the best way to design the institutions? I have received some consultations before and they They suggested that I should have it:

  player: - first_name - last_name - initial - round: * - date - course - scotch course: - name - address - hole 1 (equal / Length) - holes 2 ... 18 score: - holes 1 - hole 2 ... 18 scorcord: (only the temporary object must be deleted after completion) - player * * = many objects   
 Is this a good design? I somehow feel like I have a permanent scorcord object , Which will keep the Oller's Objects, a course object and 18 hole properties, which will get value for "3: 3: 5: 4" (each player, colon separator). / P> 
 I hope this is not a very dirty posting, and please forgive my English.   
 
 
 I would consider extrapolating the holes to be an entity. After that the properties will be "equal" and "length", there is a connection so that there are many holes of a course unit. Each hole is related to a specific curriculum.  
 The Data Moderator in XCode is really good to create a connection between visually impaired entities and theirs. I recommend using it as long as you do not think you have a good model, think about how you would use the model in your code. For example, what kind of lookup would you do?  
 For more detailed study, the value of getting a good book on object modeling is: I used Larmon's "UML and Applying Patterns: Object-Oriented Analysis and Design and Introduction to Eterative Development".