chore: add sample table and example valid entries for it

Author: david-roper

docs/en/3-guides/3.3-how-to-upload-data.md

@@ -71,8 +71,34 @@ Open Data Capture allows you to visualize numeric measures over time in a single
 
 ### Sample CSV Data
 
-This section will present how to properly fill in a template csv from the upload feature. Say we download the following csv template that looks like this below.
+This section will present how to properly fill in a template csv from the upload feature. Say we download the following csv template that looks like this below:
 
 | subjectID | date       | stringQuestion | setQuestion     | optionalQuestion | recordArrayQuestion                                  |
 | :-------- | :--------- | :------------- | :-------------- | :--------------- | :--------------------------------------------------- |
 | string    | yyyy-mm-dd | yes/no         | SET(A/B/C, ...) | A/B (optional)   | RECORD_ARRAY(testString: A/B/C, testNumber: number;) |
+|           |            |                |                 |                  |                                                      |
+
+<br>
+
+Starting with the first column we have **subjectID**, which is a string value contain the identification of the subject taking part in the instrument. This field is required.
+
+The second column contains the date of which in instrument was done by the subject, which follows _yyyy-mm-dd_ format. This field is to be filled for each row.
+
+The third column is a string entry consisting of two possible options (yes/no)
+
+The fourth column is a field which takes in a set of entries, where the options for entry are A, B or C. A set can have all these option within it however it does not accept duplicates. So an entry such as SET(A,A,C) would fail, but the entry SET(A,B,C) would be valid.
+
+The fifth column is an option string field, containing the options of A or B. This field can either contain A, B or can remain empty.
+
+Finally the sixth column is a record array field, a record array object can be entered with it with the corresponding fields testString and testNumber. A record array can also have multiple entries of the field within it, as long as the new entry is separated by a **";"**. Valid entries would be RECORD_ARRAY(testString: A, testNumber: 1;) or RECORD_ARRAY(testString: A, testNumber: 1; testString: 1, testNumber: 2;), etc.
+
+<br>
+
+A valid CSV file that follows this template can be seen below:
+
+| subjectID | date       | stringQuestion | setQuestion | optionalQuestion | recordArrayQuestion                                                         |
+| :-------- | :--------- | :------------- | :---------- | :--------------- | :-------------------------------------------------------------------------- |
+| testID123 | 2025-01-07 | yes            | SET(A, B)   | B                | RECORD_ARRAY(testString: A, testNumber: 2; testString: B, testNumber: 3;)   |
+| testID111 | 2025-01-06 | no             | SET(C, B)   | A                | RECORD_ARRAY(testString: B, testNumber: 22; testString: A, testNumber: 1;)  |
+| testID111 | 2025-01-03 | no             | SET(A, C)   |                  | RECORD_ARRAY(testString: B, testNumber: 12; testString: B, testNumber: 13;) |
+| ...       | ...        | ...            | ...         | ...              | ...                                                                         |