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# SecKeychainAttributeInfo

A structure that represents an attribute.

```
struct SecKeychainAttributeInfo
```

## Overview

Each tag and format item form a pair. Use [`SecKeychainAttributeInfoForItemID(_:_:_:)`](/documentation/Security/SecKeychainAttributeInfoForItemID(_:_:_:)) to obtain the structure for a given keychain item, and [`SecKeychainFreeAttributeInfo(_:)`](/documentation/Security/SecKeychainFreeAttributeInfo(_:)) to release that structure’s memory when you are done with it. Use an instance of this structure in a call to the [`SecKeychainItemCopyAttributesAndData(_:_:_:_:_:_:)`](/documentation/Security/SecKeychainItemCopyAttributesAndData(_:_:_:_:_:_:)) function to specify the attributes of a keychain item to retrieve.

## Topics

### Instance Properties

[`count`](/documentation/Security/SecKeychainAttributeInfo/count)

The number of tag-format pairs in the respective arrays.

[`format`](/documentation/Security/SecKeychainAttributeInfo/format)

A pointer to the first attribute format in the array.

[`tag`](/documentation/Security/SecKeychainAttributeInfo/tag)

A pointer to the first attribute tag in the array.

### Initializers

[`init(count:tag:format:)`](/documentation/Security/SecKeychainAttributeInfo/init(count:tag:format:))

Creates a new attribute information structure.


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