Add variant of StimulusPresentation to schema for required case.

src/schema/meta/associations.yaml

@@ -21,6 +21,14 @@ events:
     extension: .tsv
   inherit: true
 
+events_sidecar:
+  selectors:
+    - sidecar.PhysioType == "eyetrack"
+  target:
+    suffix: events
+    extension: .json
+  inherit: true
+
 aslcontext:
   selectors:
     - suffix == 'asl'

src/schema/rules/checks/events.yaml

@@ -43,3 +43,18 @@ SortedOnsets:
   checks:
     # n/a values will likely cause false alarms if encountered. Consider alternatives.
     - allequal(sorted(columns.onset, "numeric"), columns.onset)
+
+EyetrackRequirements:
+  issue:
+    code: EYETRACK_METADATA_MISSING
+    message: |
+      The existence of eyetracking data requires the precence of ScreenDistance, ScreenOrigin, ScreenResolution,
+      and ScreenSize in the corresponding events.json file.
+    level: Error
+    selectors:
+      - sidecar.PhysioType == "eyetrack"
+    checks:
+      - associations.events_sidecar.ScreenDistance != null
+      - associations.events_sidecar.ScreenOrigin != null
+      - associations.events_sidecar.ScreenResolution != null
+      - associations.events_sidecar.ScreenSize != null

src/schema/rules/sidecars/events.yaml

@@ -13,13 +13,9 @@ StimulusPresentation:
     StimulusPresentation: recommended
     VisionCorrection: optional
 
-StimulusPresentation_for_eyetracking:
+StimulusPresentationEyetrack:
   selectors:
     - suffix == "events"
     - associations.physio.sidecar.PhysioType == "eyetrack"
   fields:
-    StimulusPresentation.ScreenDistance: required
-    StimulusPresentation.ScreenOrigin: required
-    StimulusPresentation.ScreenRefreshRate: recommended
-    StimulusPresentation.ScreenResolution: required
-    StimulusPresentation.ScreenSize: required
+    StimulusPresentation__eyetrack__required: required