diff --git a/interface-specs/data-agreement-schema/v1/data-agreement-schema-context.jsonld b/interface-specs/data-agreement-schema/v1/data-agreement-schema-context.jsonld
index a1ca0be..6a7c0cd 100644
--- a/interface-specs/data-agreement-schema/v1/data-agreement-schema-context.jsonld
+++ b/interface-specs/data-agreement-schema/v1/data-agreement-schema-context.jsonld
@@ -120,7 +120,7 @@
                     "@id": "data_agreement:event_id",
                     "@type": "mydata:uid"
                 },
-                "time-stamp": {
+                "time_stamp": {
                     "@id": "data_agreement:event_timestamp",
                     "@type": "schema:DateTime"
                 },
@@ -134,8 +134,8 @@
                 }
             }
         },
-        "principle-did": {
-            "@id": "data_agreement:principle-did",
+        "data_subject_did": {
+            "@id": "data_agreement:data_subject_did",
             "@type": "mydata_did:2the-didmydata-format"
         },
         "proofChain": {