For ADaM TTE v1.0, the response of this API query
/mdr/adam/adam-tte-1-0/datastructures shows Basic Data Structure for Time to Event Analyses (ADTTE) as a data structure.
"title": "Basic Data Structure for Time to Event Analyses",
"type": "Data Structure"
In data modeling, ADTTE is a specialized form of the BDS data structure. CDISC is working with the standards development teams to apply this modeling concept into applicable foundational standards.