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# Global variables and macros

## Topics

### Global variables

[`NSFileProviderDomainDidChange`](/documentation/FileProvider/NSFileProviderDomainDidChange)

A notification that posts when a file provider’s domain changes.

[`NSFileProviderMaterializedSetDidChange`](/documentation/FileProvider/NSFileProviderMaterializedSetDidChange)

A notification that the system posts when the set of materialized items changes for your file provider extension.

[`NSFileProviderPendingSetDidChange`](/documentation/FileProvider/NSFileProviderPendingSetDidChange)

A notification that the system posts when the set of pending items changes for your file provider extension.

### Macros

[`FILEPROVIDER_API_AVAILABILITY_V1`](/documentation/FileProvider/FILEPROVIDER_API_AVAILABILITY_V1)

[`FILEPROVIDER_API_AVAILABILITY_V1_V2_V3`](/documentation/FileProvider/FILEPROVIDER_API_AVAILABILITY_V1_V2_V3)

[`FILEPROVIDER_API_AVAILABILITY_V2`](/documentation/FileProvider/FILEPROVIDER_API_AVAILABILITY_V2)

[`FILEPROVIDER_API_AVAILABILITY_V2_V3`](/documentation/FileProvider/FILEPROVIDER_API_AVAILABILITY_V2_V3)

[`FILEPROVIDER_API_AVAILABILITY_V2_V5`](/documentation/FileProvider/FILEPROVIDER_API_AVAILABILITY_V2_V5)

[`FILEPROVIDER_API_AVAILABILITY_V3`](/documentation/FileProvider/FILEPROVIDER_API_AVAILABILITY_V3)

[`FILEPROVIDER_API_AVAILABILITY_V3_1`](/documentation/FileProvider/FILEPROVIDER_API_AVAILABILITY_V3_1)

[`FILEPROVIDER_API_AVAILABILITY_V3_1_IOS`](/documentation/FileProvider/FILEPROVIDER_API_AVAILABILITY_V3_1_IOS)

[`FILEPROVIDER_API_AVAILABILITY_V3_IOS`](/documentation/FileProvider/FILEPROVIDER_API_AVAILABILITY_V3_IOS)

[`FILEPROVIDER_API_AVAILABILITY_V4_0`](/documentation/FileProvider/FILEPROVIDER_API_AVAILABILITY_V4_0)

[`FILEPROVIDER_API_AVAILABILITY_V4_0_IOS`](/documentation/FileProvider/FILEPROVIDER_API_AVAILABILITY_V4_0_IOS)

[`FILEPROVIDER_API_AVAILABILITY_V4_1`](/documentation/FileProvider/FILEPROVIDER_API_AVAILABILITY_V4_1)

[`FILEPROVIDER_API_AVAILABILITY_V5_0`](/documentation/FileProvider/FILEPROVIDER_API_AVAILABILITY_V5_0)

[`FILEPROVIDER_API_AVAILABILITY_V5_0_IOS`](/documentation/FileProvider/FILEPROVIDER_API_AVAILABILITY_V5_0_IOS)

[`FILEPROVIDER_API_AVAILABILITY_V5_1`](/documentation/FileProvider/FILEPROVIDER_API_AVAILABILITY_V5_1)

[`FILEPROVIDER_API_AVAILABILITY_V6_0_IOS`](/documentation/FileProvider/FILEPROVIDER_API_AVAILABILITY_V6_0_IOS)

[`FILEPROVIDER_API_AVAILABILITY_V7_0_IOS`](/documentation/FileProvider/FILEPROVIDER_API_AVAILABILITY_V7_0_IOS)

[`FILEPROVIDER_API_AVAILABILITY_V8_0_IOS`](/documentation/FileProvider/FILEPROVIDER_API_AVAILABILITY_V8_0_IOS)

[`FILEPROVIDER_API_AVAILABILITY_DESKTOP`](/documentation/FileProvider/FILEPROVIDER_API_AVAILABILITY_DESKTOP)

[`FILEPROVIDER_API_AVAILABILITY_EXTERNAL_VOLUME`](/documentation/FileProvider/FILEPROVIDER_API_AVAILABILITY_EXTERNAL_VOLUME)


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