diff --git a/core-schema.adoc b/core-schema.adoc
index 46e0ad9..9a2610a 100644
--- a/core-schema.adoc
+++ b/core-schema.adoc
@@ -124,6 +124,8 @@ The following Metadata attributes are available:
   organizational purposes only, and may not be redistributed without permission.
 ** *private*: The attribute and value may not be used for any purpose without
   permission.
+* *source*: A string representing the authority or source of the associated
+  record or attribute.
 
 Record Metadata
 ~~~~~~~~~~~~~~~
@@ -491,6 +493,12 @@ Physical address, as confirmed on the identity document.
 |*Type*         |string
 |=========================
 
+[[meta]]
+meta
+~~~~
+The _meta_ attribute is reserved for representation of attribute or record
+metadata.
+
 [[name]]
 name
 ~~~~