Workflow.md

 
 **Data input**
 --------------
-The following data is require by the scripts of this repository:
+The following data is required by the scripts of this repository:
 
 - [ICOADS v3.0](https://icoads.noaa.gov/r3.html). [Freeman. *et al.,* (2017)](https://doi.org/10.1002/joc.4775). 
 - Metadata from WMO Publication 47. 
@@ -10,9 +10,9 @@ The following data is require by the scripts of this repository:
 - Inventory of ship names in the 
 [US Maury Collection](https://icoads.noaa.gov/software/transpec/maury/mauri_out) 
 - generate_id (**needs description**) 
-- **Precision criteria file**. An estimate of the precision of each key variable (e.g. sst, lat, lon) per DCK, 
-year and or SID. This precision criteria is require in order to set tolerances 
-when comparing variables from ICOADS. Comparison of variables allows for
+- **Precision criteria file**. An estimate of the precision of each key variable (e.g. `sst, lat, lon`) per `dck`, 
+`yr` and or `sid`. This precision criteria is require in order to set tolerances 
+when comparing variables from ICOADS (See the [list of ICOADS variables](https://git.noc.ac.uk/brecinosrivas/icoads-r-hostace/-/wikis/API-Reference#icoads-variables-used) used in this repository). Comparison of variables allows for
  a match between reports in the duplicate identification procedure.  
 - **Json files** containing ITU callsign prefixes associated with a country.
 - **seq IDS.** (**needs description**) 
@@ -26,19 +26,19 @@ represents a main task done by one script in```rscripts```.
 The corresponding `.R` file name is highlight in grey between each stage 
 (For more information on eah `.R` script, please see the [API-reference](api-reference))  
 
-Orange blocks represent pre-processing tasks done to the ICOADS data base, 
+Orange blocks represent pre-processing tasks done to the ICOADS data, 
 in order to:
 
 1. Select data taken only by commercial ships, excluding 
 specialist ship data sources, such as research vessels 
 (For more information see the [selection criteria](Workflow/data-selection)).
-2. [Preprocessing of IDs](Workflow/processing-of-ids) to improve duplicate 
-identification and linking of IDs between each pair of duplicate reports.
+2. [Preprocessing of ID's](Workflow/processing-of-ids) to improve duplicate 
+identification and linking of `id`'s between each pair of duplicate reports.
 3. Preformed [quality control](Workflow/quality-control) on the data to point 
 out the best duplicate.
 
 The rest of the blocks represent processing scripts that concentrate in the duplicates 
-identification and [matching of reports IDs](Workflow/matching-criteria).  
+identification and [matching of reports ID's](Workflow/matching-criteria).  
 
 ```mermaid
 graph TB