DOC-12522 updated admonition for sync metadata (#863)

* DOC-12522 updated admonition for sync metadata

* clarify N1QL modification

Author: iamfortune

modules/ROOT/pages/sync-with-couchbase-server.adoc

@@ -129,16 +129,18 @@ As stated, mobile metadata is not kept in the document, but in a system extended
 The N1QL query language {fnref-cbs5x0} supports the ability to query these extended attributes (XATTRS) and hence the document's sync metadata -- see: <<simple-query>>.
 
 [#simple-query]
-.Querying XATTRS-bsed sync metadata
+.Querying XATTRS-based sync metadata
 ====
 [source,sql]
 ----
 SELECT meta().xattrs._sync FROM scope.collection WHERE meta().id = "mydocId"
 ----
 ====
 
-WARNING: The sync metadata is maintained internally by {sgw} and its structure can change at any time.
-It should not be used to drive business logic of applications. The direct use of the N1QL query is *unsupported* and must not be used in production environments.
+WARNING: {sgw} maintains the sync metadata internally, and its structure can change at any time. 
+Applications must not use it for business logic. 
+The direct use of the N1QL query or modifying the internal sync metadata contents to drive the business logic is unsupported and must not be used in production environments. 
+The sync metadata includes the `_sync` extended attribute (XATTR) in use case documents and all `_sync:` prefixed documents in Sync Gateway connected Buckets.
 
 === Enable Shared Bucket Access