small changes in the main document

sdrf-proteomics/README.adoc

@@ -535,24 +535,23 @@ TIP: If the SDRF do not specified the proteomics data acquisition method as _com
 
 You can find an example of a DIA experiment in the following link: https://github.com/bigbio/proteomics-sample-metadata/blob/master/annotated-projects/PXD018830/PXD018830-DIA.sdrf.tsv[DIA example]
 
-[[dia]]
+[[dia-ms1-scan]]
 ==== Data Independent Acquisition - Scan window limits
 
 Additionally to the general _comment[proteomics data acquisition method]_ column, the SDRF-Proteomics file format allows to capture other properties for the DIA method. The following properties are RECOMMENDED for DIA:
 
-- _comment[scan window lower limit]_
-- _comment[scan window upper limit]_
-
-The scan window lower and upper limits are the m/z range used for the DIA acquisition. The values are expressed in m/z units.
+- _comment[MS1 scan range]_: The MS1 scan range is the m/z range used for the DIA acquisition. The values are expressed in m/z units.
 
 Example:
 
 |===
-|        |  assay name  | comment[scan window lower limit] | comment[scan window upper limit]  | comment[data file]
-|sample 1|  run 1       | 400 m/z  | 1200 m/z | FILE_R1.RAW
-|sample 1|  run 2       | 400 m/z  | 1200 m/z | FILE_R2.RAW
+|assay name  | comment[MS1 scan range] | comment[data file]
+|run 1       | 400m/z - 1200m/z | FILE_R1.RAW
+|run 2       | 400m/z - 1200m/z | FILE_R2.RAW
 |===
 
+TIP: While the specification recommend to write the MS1 scan range as an interval (e.g. 400m/z - 1200m/z), it is also possible to write the MS1 scan range as a single value (e.g. 400m/z) using two columns for the lower and upper limits. In those cases you can write the lower limit in the _comment[scan window lower limit]_ and the uper limit in _comment[scan window upper limit]_
+
 [[use-cases]]
 == SDRF-Proteomics use-cases representation (templates)