Solid-introduction.md

-SOLID is a standard that universalizes API
+# SOLID is a standard that universalizes API
 
 Here is an example of our API : 
 ```json
@@ -94,6 +94,19 @@ Here is an example of our API :
     ]
 }
 ```
+# Looks like a simple JSON but it's more 
+
+Did you notice the presence of a context ?
+
+```json
+"@type": "foaf:user",
+    "@context": [
+        "https://cdn.happy-dev.fr/owl/hdcontext.jsonld",
+        {
+            "get_full_name": "rdfs:label"
+        }
+    ]
+```
 
 The page is still in process and constructed in french.
 You can participate to [the review](https://docs.google.com/document/d/1l70VbMxgGPAVuyT9_MtxLHhnELBE__hl40gE7AaJvk8/edit?usp=sharing)