diff --git a/edm4eic.yaml b/edm4eic.yaml
index ddf96d8..fe6f528 100644
--- a/edm4eic.yaml
+++ b/edm4eic.yaml
@@ -370,6 +370,15 @@ datatypes:
     OneToManyRelations:
       - edm4eic::TrackerHit hits            // Hits in this measurement (single or clustered)
 
+  edm4eic::TrackSeed:
+    Description: "Seed info from the realistic seed finder"
+    Author: "S. Li, B. Schmookler, J. Osborn"
+    Members:
+      - edm4hep::Vector3f         perigee   // Vector for the perigee (line surface)
+    OneToManyRelations:
+      - edm4eic::TrackerHit       hits      // Tracker hits triplet for seeding
+    OneToOneRelations:
+      - edm4eic::TrackParameters  params    // Initial track parameters
       
   edm4eic::Trajectory:
     Description: "Raw trajectory from the tracking algorithm. What is called hit here is 2d measurement indeed."
@@ -388,7 +397,9 @@ datatypes:
       - edm4eic::TrackParameters trackParameters            // Associated track parameters, if any
       - edm4eic::Measurement2D measurements_deprecated      // Measurements that were used for this track. Will move this to the edm4eic::Track
       - edm4eic::Measurement2D outliers_deprecated          // Measurements that were not used for this track. Will move this to the edm4eic::Track
-  
+    OneToOneRelations:
+      - edm4eic::TrackSeed      seed      // Corresponding track seed
+
   edm4eic::TrackParameters:
     Description: "ACTS Bound Track parameters"
     Author: "W. Armstrong, S. Joosten, J. Osborn"