Sessions-level file draft

bids-standard · Jan 23, 2022 · 5b8ce0d · 5b8ce0d
1 parent f888291
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diff --git a/src/schema/objects/suffixes.yaml b/src/schema/objects/suffixes.yaml
@@ -617,6 +617,15 @@ sbref:
   name: Single-band reference image
   description: |
     Single-band reference for one or more multi-band `dwi` images.
+sessions:
+  name: Sessions file
+  description: |
+    In case of multiple sessions there is an option of adding additional sessions.tsv files
+    describing variables changing between sessions.
+    In such case one file per participant SHOULD be added.
+    These files MUST include a session_id column and describe each session by one and only one row.
+    Column names in sessions.tsv files MUST be different from group level participant key column
+    names in the participants.tsv file.
 stim:
   name: Continuous recording
   description: |

diff --git a/src/schema/rules/datatypes/tabular_metadata.yaml b/src/schema/rules/datatypes/tabular_metadata.yaml
@@ -0,0 +1,9 @@
+---
+- suffixes:
+  - sessions
+  extensions:
+  - .tsv
+  - .json
+  entities:
+    subject: required
+    session: optional