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    <p><code>NSArray</code>s <code>[filteredArrayUsingPredicate:][1]</code> is the tool for the job.</p> <p>As noted, your <code>listCategories</code> array will contain an array of <code>Category</code> objects with each category containing an array of <code>Element</code> objects.</p> <pre><code>// Retrieve "hotel" Elements NSPredicate *hotelPredicate = [NSPredicate predicateWithFormat:@"name == hotel"]; Category *hotelCategory = [[[listCategories filteredArrayUsingPredicate:hotelPredicate] objectAtIndex: 0] retain]; NSArray *hotels = [[hotelCategory listElements] retain]; // Split the array of Elements based on star value NSPredicate *elementRatingTemplate = [NSPredicate predicateWithFormat:@"stars == $STARS"]; NSPredicate *threeStarPredicate = [elementRatingTemplate predicateWithSubstitutionVariables: [NSDictionary dictionaryWithObject:@"3" forKey:@"STARS"]; NSArray *threeStarHotels = [[hotels filteredArrayUsingPredicate: threeStarPredicate] retain]; NSPredicate *fourStarPredicate = [elementRatingTemplate predicateWithSubstitutionVariables: [NSDictionary dictionaryWithObject:@"4" forKey:@"STARS"]; NSArray *fourStarHotels = [[hotels filteredArrayUsingPredicate: fourStarPredicate] retain]; NSPredicate *fiveStarPredicate = [elementRatingTemplate predicateWithSubstitutionVariables: [NSDictionary dictionaryWithObject:@"5" forKey:@"STARS"]; NSArray *fiveStarHotels = [[hotels filteredArrayUsingPredicate: fiveStarPredicate] retain]; // Do something with the filtered arrays // Clean up retained objects. </code></pre>
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    1. This table or related slice is empty.
    1. POextract data from NSMutableArray
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
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      1. This table or related slice is empty.
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    1. COfalcon, the compiler gives me various errors with this code
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    2. COcan you post them? SO isn't a great compiler.....
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    3. CONSPredicateTemplate doesn't exist, NSArray may not respond to listElements, error: expected ':' before 'token' and confused by earlier errors, bailing out after NSArray *threeStarHotels
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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