Update README

README.md

@@ -158,10 +158,10 @@ The `"concept_sets"` object defines the structure and rules for grouping input c
 
 - **`version`**: Identifies the version of the concept set definitions being used. This can help track changes over time.  
 
-- **`columns`**: Describes the mapping of specific column names in the CSV file to attributes of the concept sets. Supported keys are:
-  - **`concept_set_name`**: Maps to the column specifying the name of the concept set.  
-  - **`concept_set_status`**: Maps to the column indicating the status of the concept set. Only concept sets the **"AGREED"** status will be outputted! 
-  - **`metadata`**: A list of additional columns in the CSV file that should be copied to the output for descriptive or contextual purposes.
+- **`concept_set`**: Defines a list of concept_set objects along with their attributes:
+  - **`concept_set_name`**: Specifies the name of the concept set.  
+  - **`concept_set_status`**: Indicates the status of the concept set. Only concept sets the **"AGREED"** status will be outputted! 
+  - **`metadata`** (optional): A list of additional properties that will be copied into the output. Can be used for descriptive or contextual purposes.
 
 The `"codes"` object specifies the source files containing input codes and assigns them to the corresponding concept sets through the `"concept_set"` field. 
 
@@ -170,13 +170,21 @@ The `"codes"` object specifies the source files containing input codes and assig
 ```json
 {
 	"concept_sets": {
-		"file":"PHEN_summary_working.csv",
-		"version":"3.2.10",
-		"columns":{
-			"concept_set_name":"CONCEPT NAME ",
-			"concept_set_status":"AGREED",
-			"metadata":["CONCEPT TYPE"]
-		}
+		"version": "3.2.10",
+		"omop": {
+			"vocabulary_id": "MELDB",
+			"vocabulary_name": "Multidisciplinary Ecosystem to study Lifecourse Determinants and Prevention of Early-onset Burdensome Multimorbidity",
+			"vocabulary_reference": "https://www.it-innovation.soton.ac.uk/projects/meldb"
+		},
+		"concept_set": [
+			{
+				"concept_set_name": "ABDO_PAIN",
+				"concept_set_status": "AGREED",
+				"metadata": {
+					"concept_set_description": "Abdominal pain",
+				}
+			}
+		]
 	},
 	"codes":[
 		{