# Alias Mapping Tables You receive logical alias keys in `contextData` and should use **Processing Rules** to map these to your own **eVars**/**props** or merchandising dimensions. The placeholders below (e.g., `eVar{X}`, `prop{Y}`) should be replaced per your availability.

Alias (contextData key)	Meaning / Use Case	Suggested Adobe Target (placeholder)	Friendly Label Example
`lsc.clockDriftInMs`	Clock skew diagnostics	prop{CLOCK_DRIFT}	Clock Drift (ms)
`lsc.eventDate`	Client-side timestamp (for sync/diagnostics)	prop{EVENT_DATE}	Client Event Date
`lsc.eventId`	Unique event instance for dedupe/debug	prop{EVENT_ID} (optionally eVar)	LiSA Event ID
`lsc.eventType`	Semantic kind of event (used for segmentation/funnels)	eVar{EVENT_TYPE}	Event Type
`lsc.locale`	Visitor-level segmentation	eVar{LOCALE}	Locale
`lsc.mediaItemId`	Media content being interacted with	eVar{MEDIA_ITEM_ID}	Media Item ID
`lsc.mediaItemType`	`'live'`, `'replay'` or `'story'`	eVar{MEDIA_TYPE}	Media Item Type
`lsc.progress.currentTimeInMs`	Playback position	prop{CURRENT_TIME_MS}	Current Time (ms)
`lsc.progress.durationInMs`	Total duration	prop{DURATION_MS}	Duration (ms)
`lsc.progress.elapsedTimeInMs`	Watch engagement	prop{ELAPSED_TIME_MS}	Elapsed Watch Time (ms)
`lsc.progress.isLive`	Underlying stream live state	eVar{IS_LIVE}	Is Live
`lsc.progress.isPlaying`	Playback active state	prop{IS_PLAYING}	Is Playing
`lsc.storeRef`	Filtering / cross-store comparison.	eVar{STORE_REF}	Region or Store
`lsc.visitorExternalId`	Your visitor/user identifier	prop{VISITOR_EXTERNAL_ID}	Visitor External ID
`lsc.visitorId`	LiSA visitor identifier (persistent per user)	eVar{VISITOR_ID}	Visitor ID
`lsc.visitorSessionId`	Session-scoped identifier	eVar{SESSION_ID}	Visitor Session ID

{% hint style="warning" %} You should create Processing Rules such as: {% endhint %} * **If** contextData key `lisa.visitorId` exists → **Set** eVar{VISITOR\_ID} = value of `lisa.visitorId` (label “LiSA Visitor ID”). * **If** contextData key `lisa.eventType` exists → **Set** eVar{EVENT\_TYPE} = value of `lisa.eventType`. See Adobe’s documentation on mapping contextData to props/eVars via Processing Rules.