From 42925e061e6dd5e1a9197a1601f4cfc8096a88c2 Mon Sep 17 00:00:00 2001
From: Remi Gau <remi_gau@hotmail.com>
Date: Sun, 5 Feb 2023 16:15:06 +0100
Subject: [PATCH 1/8] ENH: Add sample metadata to MRI and PET

Co-authored-by: Chris Markiewicz <effigies@gmail.com>
---
 .../magnetic-resonance-imaging-data.md               | 12 ++++++++++++
 .../positron-emission-tomography.md                  | 12 ++++++++++++
 src/schema/rules/sidecars/mri.yaml                   |  8 ++++++++
 src/schema/rules/sidecars/pet.yaml                   | 11 +++++++++++
 4 files changed, 43 insertions(+)

diff --git a/src/modality-specific-files/magnetic-resonance-imaging-data.md b/src/modality-specific-files/magnetic-resonance-imaging-data.md
index 7099836c40..0015df6d13 100644
--- a/src/modality-specific-files/magnetic-resonance-imaging-data.md
+++ b/src/modality-specific-files/magnetic-resonance-imaging-data.md
@@ -162,6 +162,18 @@ A guide for using macros can be found at
 -->
 {{ MACROS___make_sidecar_table("mri.MRIEchoPlanarImagingAndB0Mapping") }}
 
+#### Tissue description
+
+<!-- This block generates a metadata table.
+These tables are defined in
+  src/schema/rules/sidecars
+The definitions of the fields specified in these tables may be found in
+  src/schema/objects/metadata.yaml
+A guide for using macros can be found at
+ https://github.com/bids-standard/bids-specification/blob/master/macros_doc.md
+-->
+{{ MACROS___make_sidecar_table("mri.MRISample") }}
+
 ## Anatomy imaging data
 
 Anatomy MRI sequences measure static, structural features of the brain.
diff --git a/src/modality-specific-files/positron-emission-tomography.md b/src/modality-specific-files/positron-emission-tomography.md
index c16d144b4f..b63007ba10 100644
--- a/src/modality-specific-files/positron-emission-tomography.md
+++ b/src/modality-specific-files/positron-emission-tomography.md
@@ -216,6 +216,18 @@ A guide for using macros can be found at
 
 {{ MACROS___make_sidecar_table("pet.PETInstitutionInformation") }}
 
+#### Tissue description
+
+<!-- This block generates a metadata table.
+These tables are defined in
+  src/schema/rules/sidecars
+The definitions of the fields specified in these tables may be found in
+  src/schema/objects/metadata.yaml
+A guide for using macros can be found at
+ https://github.com/bids-standard/bids-specification/blob/master/macros_doc.md
+-->
+{{ MACROS___make_sidecar_table("pet.PETSample") }}
+
 #### Task
 
 If the OPTIONAL [`task-<label>`](../appendices/entities.md#task) is used,
diff --git a/src/schema/rules/sidecars/mri.yaml b/src/schema/rules/sidecars/mri.yaml
index 63e4a900df..cb67a1bbcb 100644
--- a/src/schema/rules/sidecars/mri.yaml
+++ b/src/schema/rules/sidecars/mri.yaml
@@ -35,6 +35,14 @@ MRIHardware:
     MatrixCoilMode: recommended
     CoilCombinationMethod: recommended
 
+MRISample:
+  selectors:
+    - modality == "mri"
+  fields:
+    BodyPart: optional
+    BodyPartDetails: optional
+    BodyPartDetailsOntology: optional
+
 MRIScannerHardwareASL:
   selectors:
     - datatype == "perf"
diff --git a/src/schema/rules/sidecars/pet.yaml b/src/schema/rules/sidecars/pet.yaml
index 353389de71..bf2095b1ed 100644
--- a/src/schema/rules/sidecars/pet.yaml
+++ b/src/schema/rules/sidecars/pet.yaml
@@ -35,6 +35,17 @@ PETInstitutionInformation:
       level: recommended
       description_addendum: Corresponds to DICOM Tag 0008, 1040 `Institutional Department Name`.
 
+PETSample:
+  selectors:
+    - modality == "pet"
+    - suffix == "pet"
+  fields:
+    BodyPart:
+      level: recommended
+      description_addendum: Corresponds to DICOM Tag 0018, 0015 `Body Part Examined`.
+    BodyPartDetails: optional
+    BodyPartDetailsOntology: optional
+
 PETRadioChemistry:
   selectors:
     - modality == "pet"

From 36644038930a51811d03365904d061ec103b1de0 Mon Sep 17 00:00:00 2001
From: Remi Gau <remi_gau@hotmail.com>
Date: Sun, 5 Feb 2023 16:15:06 +0100
Subject: [PATCH 2/8] ENH: Add generic metadata from BEP22 to MRI

---
 src/schema/objects/metadata.yaml   | 36 ++++++++++++++++++++++++++++++
 src/schema/rules/sidecars/mri.yaml |  6 +++++
 2 files changed, 42 insertions(+)

diff --git a/src/schema/objects/metadata.yaml b/src/schema/objects/metadata.yaml
index 5347a5d5b5..241b0f7c9e 100644
--- a/src/schema/objects/metadata.yaml
+++ b/src/schema/objects/metadata.yaml
@@ -237,6 +237,18 @@ B0FieldSource:
     - type: array
       items:
         type: string
+B0ShimmingTechnique:
+  name: B0ShimmingTechnique
+  display_name: B0 Shimming Technique
+  description: |
+    The technique used to shim the *B<sub>0</sub>* field (for example, `"FASTMAP"`).
+  type: string
+B1ShimmingTechnique:
+  name: B1ShimmingTechnique
+  display_name: B1 Shimming Technique
+  description: |
+    The technique used to shim the *B<sub>1</sub>* field (for example, `"Simple phase align"`).
+  type: string
 BIDSVersion:
   name: BIDSVersion
   display_name: BIDS Version
@@ -2197,6 +2209,12 @@ NumberOfVolumesDiscardedByUser:
     `"NumberOfVolumesDiscardedByUser"` field.
   type: integer
   minimum: 0
+NumberReceiveCoilActiveElements:
+  name: NumberReceiveCoilActiveElements
+  display_name: Number of Receive Coil Active Elements
+  description: |
+    The number of active RF elements used by the receive coil.
+  type: integer
 NumberShots:
   name: NumberShots
   display_name: Number Shots
@@ -2216,6 +2234,12 @@ NumberShots:
     - type: array
       items:
         type: number
+NumberTransmitCoilActiveElements:
+  name: NumberTransmitCoilActiveElements
+  display_name: Number of Transmit Coil Active Elements
+  description: |
+    The number of active RF elements used by the transmit coil.
+  type: integer
 NumericalAperture:
   name: NumericalAperture
   display_name: Numerical Aperture
@@ -3578,6 +3602,18 @@ VolumeTiming:
   items:
     type: number
     unit: s
+WaterSuppression:
+  name: WaterSuppression
+  display_name: Water Suppression
+  description: |
+    Boolean indicating whether water suppression was used prior to acquisition.
+  type: boolean
+WaterSuppressionTechnique:
+  name: WaterSuppressionTechnique
+  display_name: Water Suppression Technique
+  description: |
+    The name of the pulse sequence used for water suppression (for example, `"CHESS"`, `"VAPOR"`).
+  type: string
 WholeBloodAvail:
   name: WholeBloodAvail
   display_name: Whole Blood Avail
diff --git a/src/schema/rules/sidecars/mri.yaml b/src/schema/rules/sidecars/mri.yaml
index cb67a1bbcb..d557660832 100644
--- a/src/schema/rules/sidecars/mri.yaml
+++ b/src/schema/rules/sidecars/mri.yaml
@@ -30,10 +30,12 @@ MRIHardware:
       level: recommended, but required for Arterial Spin Labeling
     ReceiveCoilName: recommended
     ReceiveCoilActiveElements: recommended
+    NumberReceiveCoilActiveElements: optional
     GradientSetType: recommended
     MRTransmitCoilSequence: recommended
     MatrixCoilMode: recommended
     CoilCombinationMethod: recommended
+    NumberTransmitCoilActiveElements: optional
 
 MRISample:
   selectors:
@@ -75,6 +77,10 @@ MRISequenceSpecifics:
     SpoilingRFPhaseIncrement: optional
     SpoilingGradientMoment: optional
     SpoilingGradientDuration: optional
+    WaterSuppression: optional
+    WaterSuppressionTechnique: optional
+    B0ShimmingTechnique: optional
+    B1ShimmingTechnique: optional
 
 PETMRISequenceSpecifics:
   selectors:

From 22073a5ec7dc5be00ece98ee2554aa12642c488e Mon Sep 17 00:00:00 2001
From: Remi Gau <remi_gau@hotmail.com>
Date: Thu, 24 Aug 2023 15:31:11 -0400
Subject: [PATCH 3/8] rm sample

---
 src/schema/rules/sidecars/mri.yaml |  8 --------
 src/schema/rules/sidecars/pet.yaml | 11 -----------
 2 files changed, 19 deletions(-)

diff --git a/src/schema/rules/sidecars/mri.yaml b/src/schema/rules/sidecars/mri.yaml
index d557660832..0aa865ebf1 100644
--- a/src/schema/rules/sidecars/mri.yaml
+++ b/src/schema/rules/sidecars/mri.yaml
@@ -37,14 +37,6 @@ MRIHardware:
     CoilCombinationMethod: recommended
     NumberTransmitCoilActiveElements: optional
 
-MRISample:
-  selectors:
-    - modality == "mri"
-  fields:
-    BodyPart: optional
-    BodyPartDetails: optional
-    BodyPartDetailsOntology: optional
-
 MRIScannerHardwareASL:
   selectors:
     - datatype == "perf"
diff --git a/src/schema/rules/sidecars/pet.yaml b/src/schema/rules/sidecars/pet.yaml
index bf2095b1ed..353389de71 100644
--- a/src/schema/rules/sidecars/pet.yaml
+++ b/src/schema/rules/sidecars/pet.yaml
@@ -35,17 +35,6 @@ PETInstitutionInformation:
       level: recommended
       description_addendum: Corresponds to DICOM Tag 0008, 1040 `Institutional Department Name`.
 
-PETSample:
-  selectors:
-    - modality == "pet"
-    - suffix == "pet"
-  fields:
-    BodyPart:
-      level: recommended
-      description_addendum: Corresponds to DICOM Tag 0018, 0015 `Body Part Examined`.
-    BodyPartDetails: optional
-    BodyPartDetailsOntology: optional
-
 PETRadioChemistry:
   selectors:
     - modality == "pet"

From a9126e47e62eff65282e97fd5f304384ba51b365 Mon Sep 17 00:00:00 2001
From: Mark Mikkelsen <mark.mikkelsen@gmail.com>
Date: Wed, 10 Apr 2024 16:47:26 -0400
Subject: [PATCH 4/8] Update src/schema/objects/metadata.yaml

---
 src/schema/objects/metadata.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/schema/objects/metadata.yaml b/src/schema/objects/metadata.yaml
index 241b0f7c9e..01f076b531 100644
--- a/src/schema/objects/metadata.yaml
+++ b/src/schema/objects/metadata.yaml
@@ -241,7 +241,7 @@ B0ShimmingTechnique:
   name: B0ShimmingTechnique
   display_name: B0 Shimming Technique
   description: |
-    The technique used to shim the *B<sub>0</sub>* field (for example, `"FASTMAP"`).
+    The technique used to shim the *B<sub>0</sub>* field (for example, `"Dynamic shim updating"` or `"FASTMAP"`).
   type: string
 B1ShimmingTechnique:
   name: B1ShimmingTechnique

From f5f554b6d81de469b4112db7cf16410c12c2023a Mon Sep 17 00:00:00 2001
From: Mark Mikkelsen <mark.mikkelsen@gmail.com>
Date: Wed, 10 Apr 2024 18:28:10 -0400
Subject: [PATCH 5/8] Update src/schema/objects/metadata.yaml

---
 src/schema/objects/metadata.yaml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/schema/objects/metadata.yaml b/src/schema/objects/metadata.yaml
index 01f076b531..2cf6edec95 100644
--- a/src/schema/objects/metadata.yaml
+++ b/src/schema/objects/metadata.yaml
@@ -247,7 +247,8 @@ B1ShimmingTechnique:
   name: B1ShimmingTechnique
   display_name: B1 Shimming Technique
   description: |
-    The technique used to shim the *B<sub>1</sub>* field (for example, `"Simple phase align"`).
+    The technique used to shim the *B<sub>1</sub>* field (for example, `"Simple phase align"`
+    or `"Pre-saturated TurboFLASH"`).
   type: string
 BIDSVersion:
   name: BIDSVersion

From bfc116d5cb0c65d9573f148d076580eb484d9d27 Mon Sep 17 00:00:00 2001
From: Mark Mikkelsen <mark.mikkelsen@gmail.com>
Date: Wed, 10 Apr 2024 18:30:59 -0400
Subject: [PATCH 6/8] Update src/schema/objects/metadata.yaml

---
 src/schema/objects/metadata.yaml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/schema/objects/metadata.yaml b/src/schema/objects/metadata.yaml
index 2cf6edec95..30f145aa96 100644
--- a/src/schema/objects/metadata.yaml
+++ b/src/schema/objects/metadata.yaml
@@ -241,7 +241,8 @@ B0ShimmingTechnique:
   name: B0ShimmingTechnique
   display_name: B0 Shimming Technique
   description: |
-    The technique used to shim the *B<sub>0</sub>* field (for example, `"Dynamic shim updating"` or `"FASTMAP"`).
+    The technique used to shim the *B<sub>0</sub>* field (for example, `"Dynamic shim updating"`
+    or `"FASTMAP"`).
   type: string
 B1ShimmingTechnique:
   name: B1ShimmingTechnique

From f93416064cd8458fa0764df95b4dc3a3356a6c58 Mon Sep 17 00:00:00 2001
From: Remi Gau <remi_gau@hotmail.com>
Date: Thu, 11 Apr 2024 13:45:36 +0200
Subject: [PATCH 7/8] rm macros with missing metadata

---
 .../magnetic-resonance-imaging-data.md               | 12 ------------
 .../positron-emission-tomography.md                  | 12 ------------
 2 files changed, 24 deletions(-)

diff --git a/src/modality-specific-files/magnetic-resonance-imaging-data.md b/src/modality-specific-files/magnetic-resonance-imaging-data.md
index 0015df6d13..7099836c40 100644
--- a/src/modality-specific-files/magnetic-resonance-imaging-data.md
+++ b/src/modality-specific-files/magnetic-resonance-imaging-data.md
@@ -162,18 +162,6 @@ A guide for using macros can be found at
 -->
 {{ MACROS___make_sidecar_table("mri.MRIEchoPlanarImagingAndB0Mapping") }}
 
-#### Tissue description
-
-<!-- This block generates a metadata table.
-These tables are defined in
-  src/schema/rules/sidecars
-The definitions of the fields specified in these tables may be found in
-  src/schema/objects/metadata.yaml
-A guide for using macros can be found at
- https://github.com/bids-standard/bids-specification/blob/master/macros_doc.md
--->
-{{ MACROS___make_sidecar_table("mri.MRISample") }}
-
 ## Anatomy imaging data
 
 Anatomy MRI sequences measure static, structural features of the brain.
diff --git a/src/modality-specific-files/positron-emission-tomography.md b/src/modality-specific-files/positron-emission-tomography.md
index b63007ba10..c16d144b4f 100644
--- a/src/modality-specific-files/positron-emission-tomography.md
+++ b/src/modality-specific-files/positron-emission-tomography.md
@@ -216,18 +216,6 @@ A guide for using macros can be found at
 
 {{ MACROS___make_sidecar_table("pet.PETInstitutionInformation") }}
 
-#### Tissue description
-
-<!-- This block generates a metadata table.
-These tables are defined in
-  src/schema/rules/sidecars
-The definitions of the fields specified in these tables may be found in
-  src/schema/objects/metadata.yaml
-A guide for using macros can be found at
- https://github.com/bids-standard/bids-specification/blob/master/macros_doc.md
--->
-{{ MACROS___make_sidecar_table("pet.PETSample") }}
-
 #### Task
 
 If the OPTIONAL [`task-<label>`](../appendices/entities.md#task) is used,

From 943c20e619567855ccee2896b65c1001f338010c Mon Sep 17 00:00:00 2001
From: Oscar Esteban <code@oscaresteban.es>
Date: Thu, 11 Apr 2024 18:41:58 +0200
Subject: [PATCH 8/8] [FIX] Move ``_stim.<ext>`` specification within the Task
 Events module (#1750)

* fix: move ``_stim.<ext>`` specification within the task events module

Depends-on: #1749.

* Apply suggestions from code review

Co-authored-by: Remi Gau <remi_gau@hotmail.com>

* Update src/modality-specific-files/task-events.md

* Update src/modality-specific-files/physiological-recordings.md

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* enh: improve admonitions

* Apply suggestions from code review

Co-authored-by: Chris Markiewicz <effigies@gmail.com>

* fix: markdown link with linebreak

* fix: missing literal closing backtick

* Apply suggestions from code review

Co-authored-by: Remi Gau <remi_gau@hotmail.com>

* fix: typo

* fix: consistency and ``[recording-<label>]`` soft removal

* enh: add synthetic example

* fix: defining links inside admonition

* Apply suggestions from code review

* Update src/modality-specific-files/task-events.md

---------

Co-authored-by: Remi Gau <remi_gau@hotmail.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Chris Markiewicz <effigies@gmail.com>
---
 mkdocs.yml                                    |  4 +-
 ...ordings.md => physiological-recordings.md} | 33 +++----
 src/modality-specific-files/task-events.md    | 87 ++++++++++++++++++-
 3 files changed, 99 insertions(+), 25 deletions(-)
 rename src/modality-specific-files/{physiological-and-other-continuous-recordings.md => physiological-recordings.md} (84%)

diff --git a/mkdocs.yml b/mkdocs.yml
index 051aa2aaa6..114e05c135 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -12,7 +12,7 @@ nav:
           - Electroencephalography: modality-specific-files/electroencephalography.md
           - Intracranial Electroencephalography: modality-specific-files/intracranial-electroencephalography.md
           - Task events: modality-specific-files/task-events.md
-          - Physiological and other continuous recordings: modality-specific-files/physiological-and-other-continuous-recordings.md
+          - Physiological recordings: modality-specific-files/physiological-recordings.md
           - Behavioral experiments (with no neural recordings): modality-specific-files/behavioral-experiments.md
           - Genetic Descriptor: modality-specific-files/genetic-descriptor.md
           - Positron Emission Tomography: modality-specific-files/positron-emission-tomography.md
@@ -122,7 +122,7 @@ plugins:
         "04-modality-specific-files/03-electroencephalography.md": "modality-specific-files/electroencephalography.md"
         "04-modality-specific-files/04-intracranial-electroencephalography.md": "modality-specific-files/intracranial-electroencephalography.md"
         "04-modality-specific-files/05-task-events.md": "modality-specific-files/task-events.md"
-        "04-modality-specific-files/06-physiological-and-other-continuous-recordings.md": "modality-specific-files/physiological-and-other-continuous-recordings.md"
+        "04-modality-specific-files/06-physiological-and-other-continuous-recordings.md": "modality-specific-files/physiological-recordings.md"
         "04-modality-specific-files/07-behavioral-experiments.md": "modality-specific-files/behavioral-experiments.md"
         "04-modality-specific-files/08-genetic-descriptor.md": "modality-specific-files/genetic-descriptor.md"
         "04-modality-specific-files/09-positron-emission-tomography.md": "modality-specific-files/positron-emission-tomography.md"
diff --git a/src/modality-specific-files/physiological-and-other-continuous-recordings.md b/src/modality-specific-files/physiological-recordings.md
similarity index 84%
rename from src/modality-specific-files/physiological-and-other-continuous-recordings.md
rename to src/modality-specific-files/physiological-recordings.md
index 8ecd00febe..897deb3d1b 100644
--- a/src/modality-specific-files/physiological-and-other-continuous-recordings.md
+++ b/src/modality-specific-files/physiological-recordings.md
@@ -1,11 +1,8 @@
-# Physiological and other continuous recordings
+# Physiological recordings
 
-## Physiological recordings
-
-Physiological recordings such as cardiac and respiratory signals and other
-continuous measures (such as parameters of a film or audio stimuli) MAY be
+Physiological recordings such as cardiac and respiratory signals MAY be
 specified using a [compressed tabular file](../common-principles.md#compressed-tabular-files)
-([TSVGZ file](../glossary.md#tsvgz-extensions)) and a corresponding
+([TSV.GZ file](../glossary.md#tsvgz-extensions)) and a corresponding
 JSON file for storing metadata fields (see below).
 
 !!! example "Example datasets"
@@ -24,8 +21,6 @@ sub-<label>/[ses-<label>/]
     <datatype>/
         <matches>[_recording-<label>]_physio.tsv.gz
         <matches>[_recording-<label>]_physio.json
-        <matches>[_recording-<label>]_stim.tsv.gz
-        <matches>[_recording-<label>]_stim.json
 ```
 
 For the template directory name, `<datatype>` can correspond to any data
@@ -37,12 +32,12 @@ before the suffix.
 For example for the file `sub-control01_task-nback_run-1_bold.nii.gz`,
 `<matches>` would correspond to `sub-control01_task-nback_run-1`.
 
-!!! note "TSVGZ headers are specified in metadata files."
+!!! warning "Caution"
 
-    TSVGZ files MUST NOT include a header line,
-    as established by the [common-principles](../common-principles.md#compressed-tabular-files).
-    As a result, when supplying a `*_<physio|stim>.tsv.gz` file, an accompanying
-    `*_<physio|stim>.json` MUST be supplied as well.
+    `<matches>_physio.tsv.gz` files MUST NOT include a header line, as established by the
+    [common-principles](../common-principles.md#compressed-tabular-files).
+    As a result, when supplying a `<matches>_physio.tsv.gz` file, an accompanying
+    `<matches>_physio.json` MUST be present to indicate the column names.
 
 The [`recording-<label>`](../appendices/entities.md#recording)
 entity MAY be used to distinguish between several recording files.
@@ -51,10 +46,9 @@ the eyetracking data in a certain sampling frequency, and
 `sub-01_task-bart_recording-breathing_physio.tsv.gz` to contain respiratory
 measurements in a different sampling frequency.
 
-Physiological recordings (including eyetracking) SHOULD use the `_physio`
-suffix, and signals related to the stimulus SHOULD use `_stim` suffix.
+Physiological recordings (including eyetracking) MUST use the `_physio` suffix.
 
-The following tables specify metadata fields for the `*_<physio|stim>.json` file.
+The following tables specify metadata fields for the `*_physio.json` file.
 
 <!-- This block generates a metadata table.
 These tables are defined in
@@ -174,13 +168,8 @@ stored in separate files
 (and the [`recording-<label>`](../appendices/entities.md#recording)
 entity MAY be used to distinguish these files).
 
-If the same continuous recording has been used for all subjects (for example in
-the case where they all watched the same movie), one file MAY be used and
-placed in the root directory.
-For example, `task-movie_stim.tsv.gz`
-
 For motion parameters acquired from MRI scanner side motion correction, the
-`_physio` suffix SHOULD be used.
+`_physio` suffix MUST be used.
 
 For multi-echo data, a given `physio.tsv` file is applicable to all echos of
 a particular run.
diff --git a/src/modality-specific-files/task-events.md b/src/modality-specific-files/task-events.md
index 9b0ffa69f3..c3822094a5 100644
--- a/src/modality-specific-files/task-events.md
+++ b/src/modality-specific-files/task-events.md
@@ -126,7 +126,7 @@ Note that in the example above:
 
 1.  The `channel` column contains a list of values that are separated
     by a delimiter (`|`), as is declared in the `Delimiter` metadata
-    field of the `events.json file.
+    field of the `events.json` file.
     Thus, the channels related to the event in the third row of the example
     are called `F,1`, `F,2`, and `Cz`.
 
@@ -311,3 +311,88 @@ in the accompanying JSON sidecar as follows (based on the example of the previou
     "VisionCorrection": "lenses"
 }
 ```
+
+### Continuously-sampled, stimulus-related signals
+
+!!! example "Example datasets"
+
+      The following [BIDS-Examples](https://bids-standard.github.io/bids-examples/#dataset-index)
+      showcase stimulus-related signals and may be used as a reference
+      when curating a new dataset:
+
+      -   ["synthetic" example dataset](https://github.com/bids-standard/bids-examples/tree/master/synthetic).
+
+Signals related to stimuli (such as parameters of a film or audio stimuli) that are
+evenly recorded at a constant sampling frequency MUST be specified using a
+[compressed tabular file](../common-principles.md#compressed-tabular-files)
+([TSV.GZ file](../glossary.md#tsvgz-extensions)) and a corresponding
+JSON file for storing metadata fields (see below).
+
+Template:
+
+```Text
+sub-<label>/[ses-<label>/]
+    <datatype>/
+        <matches>_stim.tsv.gz
+        <matches>_stim.json
+```
+
+For the template directory name, `<datatype>` can correspond to any data
+recording modality.
+
+In the template filenames, the `<matches>` part corresponds to task filename
+before the suffix.
+For example for the file `sub-control01_task-nback_run-1_bold.nii.gz`,
+`<matches>` would correspond to `sub-control01_task-nback_run-1`.
+
+!!! warning "Caution"
+
+    `<matches>_stim.tsv.gz` files MUST NOT include a header line,
+    as established by the [common-principles](../common-principles.md#compressed-tabular-files).
+    As a result, when supplying a `<matches>_stim.tsv.gz` file, an accompanying
+    `<matches>_stim.json` MUST be present to indicate the column names.
+
+If the same continuous recording has been used for all subjects (for example in
+the case where they all watched the same movie), one file placed in the
+root directory (for example, `<root>/task-movie_stim.<tsv.gz|json>`) MAY be used
+and will apply to all `<matches>_task-movie_<matches>_<suffix>.<ext>` files.
+In the following example, the two `task-nback_stim.<json|tsv.gz>` apply
+to all the `task-nback` runs across the two available subjects:
+
+<!-- This block generates a file tree.
+A guide for using macros can be found at
+ https://github.com/bids-standard/bids-specification/blob/master/macros_doc.md
+-->
+{{ MACROS___make_filetree_example({
+  "sub-01": {
+    "func": {
+      "sub-01_task-nback_run-1_bold.nii.gz": "",
+      "sub-01_task-nback_run-2_bold.nii.gz": "",
+    },
+  },
+  "sub-02": {
+    "func": {
+      "sub-02_task-nback_run-1_bold.nii.gz": "",
+      "sub-02_task-nback_run-2_bold.nii.gz": "",
+    },
+  },
+  "task-nback_stim.json": "",
+  "task-nback_stim.tsv.gz": "",
+}) }}
+
+The following table specifies metadata fields for the
+`<matches>_stim.json` file.
+
+<!-- This block generates a metadata table.
+These tables are defined in
+  src/schema/rules/sidecars
+The definitions of the fields specified in these tables may be found in
+  src/schema/objects/metadata.yaml
+A guide for using macros can be found at
+ https://github.com/bids-standard/bids-specification/blob/master/macros_doc.md
+-->
+{{ MACROS___make_sidecar_table(["continuous.Continuous"]) }}
+
+Additional metadata may be included as in
+[any TSV file](../common-principles.md#tabular-files) to specify, for
+example, the units of the recorded time series for each column.