1# MediaLibrary_RequestId 2 3## Overview 4 5The struct describes a request ID. 6 7A value of this type is returned when a media asset is requested. 8 9The request ID can be used to cancel a request. 10 11If a request fails, an all-zero value, for example, **00000000-0000-0000-0000-000000000000** is returned. 12 13**Since**: 12 14 15**Related module**: [MediaAssetManager](capi-mediaassetmanager.md) 16 17**Header file**: [media_asset_base_capi.h](capi-media-asset-base-capi-h.md) 18 19## Summary 20 21### Member Variables 22 23| Name| Description| 24| -- | -- | 25| char requestId[UUID_STR_MAX_LENGTH] | Request ID.| 26