docs: Mention that custom annotations can be created
@@ -6,7 +6,10 @@ Annotations
*Annotations* are named values associated with schema items and
are designed to hold arbitrary schema-level metadata represented as a
-:eql:type:`str`.
+:eql:type:`str`. Users can define custom annotations via
+:ref:`SDL <ref_eql_sdl_schema_annotations>` or
+:ref:`DDL <ref_eql_ddl_schema_annotations>`.
+
Standard Annotations
