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# Usability and Errors

Additional objects to use for reference.

## Topics

### API Usability

[`object Condition`](/documentation/apple_ads/Condition)

The list of condition objects that allow users to filter a list of records.

[`object PageDetail`](/documentation/apple_ads/PageDetail)

The number of items that return in the page.

[`object Pagination`](/documentation/apple_ads/Pagination)

The procedure to refine returned results using limit and offset parameters.

[`object Selector`](/documentation/apple_ads/Selector)

The selector objects available to filter returned data.

[`object Sorting`](/documentation/apple_ads/Sorting)

The order of grouped results.


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