Clarify TD and DC note

fNIRS · Jul 22, 2024 · 30c563d · 30c563d
1 parent 4cab732
commit 30c563d
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/snirf_specification.md b/snirf_specification.md
@@ -496,7 +496,7 @@ for list of possible values.
 * **Type**:  integer
 * **Location**: `/nirs(i)/data(j)/measurementList(k)/dataTypeIndex`
 
-Data-type specific parameter index. The data type index specifies additional data type specific parameters that are further elaborated by other fields in the probe structure, as detailed below. One use of this parameter is as a stimulus condition index when `measurementList(k).dataType = 99999` (i.e, `processed` and `measurementList(k).dataTypeLabel = 'HRF ...'` .
+Data-type specific parameter index. The data type index specifies additional data type specific parameters that are further elaborated by other fields in the probe structure, as detailed below. Note that the Time Domain and Diffuse Correlation Spectroscopy data types have two additional parameters and so the data type index is used to map both those additional parameters with the same index. One use of this parameter is as a stimulus condition index when `measurementList(k).dataType = 99999` (i.e, `processed` and `measurementList(k).dataTypeLabel = 'HRF ...'` .
 
 #### /nirs(i)/data(j)/measurementList(k)/sourcePower 
 * **Presence**: optional