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# IOHIDElementCollectionType

Constants that indicate the types of relationships that exist between two or more elements.

```
enum IOHIDElementCollectionType : unsigned int;
```

## Topics

### Getting the Element Collection Types

[`kIOHIDElementCollectionTypePhysical`](/documentation/HIDDriverKit/IOHIDElementCollectionType/kIOHIDElementCollectionTypePhysical)

A collection in which the child elements are data points collected at one geometric point.

[`kIOHIDElementCollectionTypeApplication`](/documentation/HIDDriverKit/IOHIDElementCollectionType/kIOHIDElementCollectionTypeApplication)

A collection in which the child elements serve different purposes in a single device.

[`kIOHIDElementCollectionTypeLogical`](/documentation/HIDDriverKit/IOHIDElementCollectionType/kIOHIDElementCollectionTypeLogical)

A collection in which the child elements form a composite data structure.

[`kIOHIDElementCollectionTypeReport`](/documentation/HIDDriverKit/IOHIDElementCollectionType/kIOHIDElementCollectionTypeReport)

A collection that wraps all the other elements in a report.

[`kIOHIDElementCollectionTypeNamedArray`](/documentation/HIDDriverKit/IOHIDElementCollectionType/kIOHIDElementCollectionTypeNamedArray)

A collection in which the elements are an array of selector usages.

[`kIOHIDElementCollectionTypeUsageSwitch`](/documentation/HIDDriverKit/IOHIDElementCollectionType/kIOHIDElementCollectionTypeUsageSwitch)

A collection that modifies the meaning of the usage it contains.

[`kIOHIDElementCollectionTypeUsageModifier`](/documentation/HIDDriverKit/IOHIDElementCollectionType/kIOHIDElementCollectionTypeUsageModifier)

A collection that modifies the meaning of the usage attached to the encompassing collection.


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