Merge branch 'master' into enh/fieldmaps-refactor

.circleci/config.yml

@@ -37,7 +37,7 @@ jobs:
           name: check links
           command: |
             git status
-            if (! git log -1 --pretty=%b | grep REL:) ; then
+            if (! git log -1 --pretty=oneline | grep REL:) ; then
               chmod a+rX -R ~
               linkchecker -t 1 ~/project/site/
               # check external separately by pointing to all *html so no

CONTRIBUTING.md

@@ -25,7 +25,7 @@ Jump to the following sections:
 -   [Example pull request](#example-pull-request)
 -   [Commenting on a pull request](#commenting-on-a-pull-request)
 -   [Accepting suggestion from a review](#accepting-suggestion-from-a-review)
--   [Updating the specification schema](#updating-the-schema)
+-   [Making a change to the BIDS-schema](#making-a-change-to-the-BIDS-schema)
 -   [Recognizing contributions](#recognizing-contributions)
 
 ## Joining the community
@@ -575,47 +575,20 @@ reviewer as a co-author.
 
 ![BIDS_pr_reviewer_credit](commenting_images/BIDS_pr_reviewer_credit.png "BIDS_pr_reviewer_credit")
 
-## Updating the schema
-
-Portions of the BIDS specification are defined using YAML files, in order to
-make the specification machine-readable.
-Currently, the only portion of the specification that relies on this schema is
-the Entity Table, but any changes to the specification should be mirrored in the schema.
-
-### The format of the schema
-
-The schema reflects the files and objects in the specification, as well as
-associations between these objects.
-Here is a list of the files and subfolders of the schema, roughly in order of importance:
-
-- `datatypes/*.yaml`:
-    Data types supported by the specification.
-    Each datatype may support many suffixes.
-    These suffixes are divided into groups based on what extensions and entities are allowed for each.
-    Data types correspond to subfolders (for example, `anat`, `func`) in the BIDS structure.
-- `entities.yaml`:
-    A list of entities (key/value pairs in folder and filenames) with associated descriptions and formatting rules.
-    The order of the entities in the file determines the order in which entities must appear in filenames.
-- `top_level_files.yaml`:
-    Modality-agnostic files stored at the top level of a BIDS dataset.
-    The schema specifies whether these files are required or optional, as well as acceptable extensions for each.
-- `modalities.yaml`:
-    Modalities supported by the specification, along with a list of associated data types.
-    Modalities are not reflected directly in the BIDS structure, but data types are modality-specific.
-- `associated_data.yaml`:
-    Folders that are commonly contained within the same folder as a BIDS dataset, but which do not follow the BIDS structure internally, such as `code` or `sourcedata`.
-    The schema specifies which folders are accepted and whether they are required or optional.
-
-### Making a change to the schema
-
-#### 1. Ensure that changes to the specification are matched in the schema
+## Making a change to the BIDS-schema
+
+Several aspects of the specification are defined in a set of YAML files in the 
+`src/schema` folder. The content of those files is described in a dedicated 
+[README file](./src/schema/README.md).
+
+### 1. Ensure that changes to the specification are matched in the schema
 
 The schema formalizes the rules described in the specification text, so you must
 ensure that any changes which impact the rules of the specification (including,
 but not limited to, adding new entities, suffixes, datatypes, modalities) are
 reflected in the schema as well.
 
-#### 2. Ensure that changes to the schema are matched in auto-generated sections of the specification
+### 2. Ensure that changes to the schema are matched in auto-generated sections of the specification
 
 The schema is used to generate a number of elements in the specification text, including:
 - Filename format templates
@@ -625,7 +598,7 @@ The schema is used to generate a number of elements in the specification text, i
 As such, you need to ensure that the functions used throughout the specification to render these elements are appropriately referencing the schema.
 In essence, please make sure, if your changes do impact how functions should be called, that you also update how the function are called.
 
-#### 3. Render the specification with `mkdocs` to check your changes
+### 3. Render the specification with `mkdocs` to check your changes
 
 Run `mkdocs serve` and open `localhost:8000` to browse the rendered specification.
 Make sure that all filename format templates, entity tables, and entity definitions are correct
@@ -635,7 +608,7 @@ While the continuous integration run on pull requests by the repository will ren
 it is crucial to manually review the rendered changes to ensure that the code not only successfully runs,
 but also that the rendered changes appear as expected.
 
-#### 4. Push your changes
+### 4. Push your changes
 
 For more information on making general changes with a pull request, please
 review

mkdocs.yml

@@ -1,4 +1,4 @@
-site_name: Brain Imaging Data Structure v1.6.0-dev
+site_name: Brain Imaging Data Structure v1.6.1-dev
 theme:
     name: material
     custom_dir: theme_customizations/
@@ -35,6 +35,7 @@ nav:
         - Physiological and other continuous recordings: 04-modality-specific-files/06-physiological-and-other-continuous-recordings.md
         - Behavioral experiments (with no neural recordings): 04-modality-specific-files/07-behavioral-experiments.md
         - Genetic Descriptor: 04-modality-specific-files/08-genetic-descriptor.md
+        - Positron Emission Tomography: 04-modality-specific-files/09-positron-emission-tomography.md
       - Derivatives:
         - BIDS Derivatives: 05-derivatives/01-introduction.md
         - Common data types and metadata: 05-derivatives/02-common-data-types.md
@@ -54,6 +55,7 @@ nav:
         - File collections: 99-appendices/10-file-collections.md
         - Quantitative MRI: 99-appendices/11-qmri.md
         - Arterial Spin Labeling: 99-appendices/12-arterial-spin-labeling.md
+        - Cross modality correspondence: 99-appendices/13-cross-modality-correspondence.md
       - Changelog: CHANGES.md
     - The BIDS Starter Kit:
       - GitHub repository: https://github.com/bids-standard/bids-starter-kit

src/01-introduction.md

@@ -111,6 +111,18 @@ For example:
     Scientific Data, 5 (180110).
     [doi:10.1038/sdata.2018.110](https://doi.org/10.1038/sdata.2018.110)
 
+#### PET
+
+-   Knudsen GM, Ganz M, Appelhoff S, Boellaard R, Bormans G, Carson RE, Catana C,
+    Doudet D, Gee AD, Greve DN, Gunn RN, Halldin C, Herscovitch P, Huang H, Keller SH,
+    Lammertsma AA, Lanzenberger R, Liow JS, Lohith TG, Lubberink M, Lyoo CH, Mann JJ,
+    Matheson GJ, Nichols TE, Nørgaard M, Ogden T, Parsey R, Pike VW, Price J, Rizzo G,
+    Rosa-Neto P, Schain M, Scott PJH, Searle G, Slifstein M, Suhara T, Talbot PS,
+    Thomas A, Veronese M, Wong DF, Yaqub M, Zanderigo F, Zoghbi S, Innis RB. (2020).
+    **Guidelines for Content and Format of PET Brain Data in Publications and in Archives: A Consensus Paper**.
+    Journal of Cerebral Blood Flow and Metabolism, 2020 Aug; 40(8): 1576-1585.
+    [doi:10.1177/0271678X20905433](https://doi.org/10.1177/0271678X20905433)
+
 #### Genetics
 
 -   Clara Moreau, Martineau Jean-Louis, Ross Blair, Christopher Markiewicz, Jessica Turner,

src/02-common-principles.md

@@ -28,6 +28,9 @@ misunderstanding we clarify them here.
     sessions is appropriate when several identical or similar data acquisitions
     are planned and performed on all -or most- subjects, often in the case of
     some intervention between sessions (for example, training).
+    In the [PET](04-modality-specific-files/09-positron-emission-tomography.md)
+    context, a session may also indicate a group of related scans,
+    taken in one or more visits.
 
 1.  **Data acquisition** - a continuous uninterrupted block of time during which
     a brain scanning instrument was acquiring data according to particular
@@ -73,6 +76,13 @@ misunderstanding we clarify them here.
     acquisition parameters and task (however events can change from run to run
     due to different subject response or randomized nature of the stimuli). Run
     is a synonym of a data acquisition.
+    Note that "uninterrupted" may look different by modality due to the nature of the
+    recording.
+    For example, in [MRI](04-modality-specific-files/01-magnetic-resonance-imaging-data.md)
+    or [MEG] (04-modality-specific-files/02-magnetoencephalography.md),
+    if a subject leaves the scanner, the acquisition must be restarted.
+    For some types of [PET](04-modality-specific-files/09-positron-emission-tomography.md) acquisitions,
+    a subject may leave and re-enter the scanner without interrupting the scan.
 
 1.  **Modality** - the category of brain data recorded by a file.
     For MRI data, different pulse sequences are considered distinct modalities,
@@ -244,7 +254,7 @@ This specification does not prescribe anything about the contents of `sourcedata
 folders in the above example - nor does it prescribe the `sourcedata`,
 `derivatives`, or `rawdata` folder names.
 The above example is just a convention that can be useful for organizing raw,
-source, and derived data while maintaining BIDS compliancy of the raw data
+source, and derived data while maintaining BIDS compliance of the raw data
 folder. When using this convention it is RECOMMENDED to set the `SourceDatasets`
 field in `dataset_description.json` of each subfolder of `derivatives` to: