deal with the previous changes

1 files changed, 6 insertions, 0 deletions

diff --git a/entity/interface.go b/entity/interface.go
index dd5d69b1..fb4735e4 100644
--- a/entity/interface.go
+++ b/entity/interface.go
@@ -2,5 +2,11 @@ package entity
 
 type Interface interface {
 	// Id return the Entity identifier
+	//
+	// This Id need to be immutable without having to store the entity somewhere (ie, an entity only in memory
+	// should have a valid Id, and it should not change if further edit are done on this entity).
+	// How to achieve that is up to the entity itself. A common way would be to take a hash of an immutable data at
+	// the root of the entity.
+	// It is acceptable to use such a hash and keep mutating that data as long as Id() is not called.
 	Id() Id
 }