This page covers the Asset ID reporting dimension. See Asset ID for how to collect this variable.
The Asset ID dimension reports a stable industry identifier for the underlying media asset (typically an EIDR, TMS/Gracenote, or Rovi ID, but proprietary IDs are also accepted).
How this dimension is populated
Asset ID is set by the player at session start.
a.media.asset to an eVar.evar1-evar250, post_evar1-post_evar250 (the eVar that your processing rule maps a.media.asset to)Classification approach
Adobe creates the Asset ID classification structure automatically when Video Metadata is enabled for the report suite. You are responsible for populating and maintaining the classification using Classification sets.
This approach provides a guaranteed 1:1 relationship between each content ID and its asset ID. Classification updates apply retroactively across all historical data for that ID.
Processing rule approach
Create a Processing rule that maps a.media.asset to an eVar. This approach captures the asset ID as a per-hit value without requiring classification maintenance.
The trade-off is that you lose the guaranteed 1:1 relationship between the asset ID and the parent Content (ID) dimension. If your implementation sends inconsistent values for the same content ID across events, multiple asset IDs can appear under the same content. Updating a value only applies to data moving forward.
Dimension items
Each item is a unique asset ID value reported during the report period. Use a single stable identifier per asset across all distribution platforms so the same content rolls up to a single line item.