updated README.md

README.md

@@ -8,10 +8,65 @@ The proxy intercepts search requests and record them into Elasticsearch for furt
 
 ## Data schema
 
+```
+{
+  "user": {},
+  "times": {
+    "start": "2019-12-29T10: 23: 47.085Z",
+    "end": "2019-12-29T10: 23: 47.097Z",
+    "req_took_ms": 12,
+    "elastic_took_ms": 5
+  },
+  "query": {
+    "params": {},
+    "body": null,
+    "headers": {
+      "host": "localhost:9205",
+      "user-agent": "curl/7.61.0",
+      "accept": "*/*",
+      "x-opaque-id": "123",
+      "content-type": "application/json",
+      "x-query-tracker-id": "1234",
+      "x-query-tracker-tags": "itay, or"
+    },
+    "tags": [
+      "itay",
+      "or"
+    ],
+    "id": "1234"
+  },
+  "is_search_request": true,
+  "response": {
+    "took": 5,
+    "timed_out": false,
+    "shards": {
+      "total": 1,
+      "successful": 1,
+      "skipped": 0,
+      "failed": 0
+    },
+    "total": {
+      "value": 3,
+      "relation": "eq"
+    }
+  }
+}
+```
 
 ## Tagging your data
 
+The proxy support custom HTTP headers for better segmentation of the data:
+
+| Header       | Description | Example               |
+|--------------|------------| -----------|
+| x-query-tracker-tags         | Comma seperated list of tags            | auth,login
+| x-query-tracker-id | A unique query identifier | query-1234
 
+Here's an example curl:
+
+```
+$ curl -v -H"Content-Type: application/json" -H"X-query-tracker-id: query-1234" -H"X-query-tracker-tags: auth, login" localhost:9205/_search
+```
 
 ## Running Elastic Query Tracker
 
@@ -23,7 +78,7 @@ $ node index.js
 
 The proxy accepts the following environment variables:
 
-| env var      | default value         |
+| Environment var      | Default value         |
 |--------------|-----------------------|
 | PORT         | 9095                  |
 | ELASTIC_HOST | http://localhost:9200 |