diff --git a/Proposal:-application-schema-coordination-and-versioning.md b/Proposal:-application-schema-coordination-and-versioning.md
index ee779d9..c4ac632 100644
--- a/Proposal:-application-schema-coordination-and-versioning.md
+++ b/Proposal:-application-schema-coordination-and-versioning.md
@@ -11,6 +11,7 @@ A collection of attributes — our vocabulary — is called a **schema fragment
 
 An **application** is a piece of software that reads from or writes to a datom store. One example would be a Firefox add-on.
 
+We expect that simple applications might use a single schema fragment, and more complicated applications might share some schema fragments. For example, a bookmark manager might use 'save' and 'page' fragments; a history tool might use a 'visit' fragment and the same 'page' fragment.
 
 ## One application