diff --git a/misp-core-format/raw.md.txt b/misp-core-format/raw.md.txt
index 9d30f91..35153d0 100644
--- a/misp-core-format/raw.md.txt
+++ b/misp-core-format/raw.md.txt
@@ -197,10 +197,10 @@ Internet-Draft              MISP core format                October 2016
 
 2.2.1.7.  timestamp
 
-   timestamp represents a reference time when the event was created, or
-   last updated/edited on the instance. timestamp is expressed in
-   seconds (decimal) since 1st of January 1970 (Unix timestamp).  The
-   time zone MUST be UTC.
+   timestamp represents a reference time when the event, or one of the 
+   attributes within the event was created, or last updated/edited 
+   on the instance. timestamp is expressed in seconds (decimal) since 
+   1st of January 1970 (Unix timestamp). The time zone MUST be UTC.
 
    timestamp is represented as a JSON string. timestamp MUST be present.