Merge pull request #652 from wmde/release51

Release 5.1.0

RELEASE-NOTES.md

@@ -1,8 +1,10 @@
 # Wikibase DataModel release notes
 
-## Version 5.1.0 (dev)
+## Version 5.1.0 (2016-03-08)
 
-* `Item::copy` and `Property::copy` do not clone immutable objects any more, saving time and memory
+This release significantly reduces the memory footprint when entities are cloned.
+
+* `Item::copy` and `Property::copy` do not clone immutable objects any more
 * Deprecated `FingerprintHolder` and `StatementListHolder`
 
 ## Version 5.0.2 (2016-02-23)
@@ -16,6 +18,9 @@
 
 ## Version 5.0.0 (2016-02-15)
 
+This release removes the last remaining mentions of claims. Claims are still a concept in the mental
+data model, but not modelled in code any more.
+
 * Removed `Claims` class (deprecated since 1.0)
 * Removed `getClaims` and `setClaims` methods from `Entity`, `Item` and `Property` (deprecated since 1.0)
 * Removed `HashableObjectStorage` class (deprecated since 4.4)

src/Entity/EntityDocument.php

@@ -73,8 +73,8 @@ public function equals( $target );
 	 * No change done to the clone is allowed to interfere with the original object. Only properties
 	 * containing immutable objects are allowed to (and should) reference the original object.
 	 *
-	 * Since EntityDocuments are not immutable (at least the id can be set) the method is not
-	 * allowed to return $this.
+	 * Since EntityDocuments are mutable (at least the id can be set) the method is not allowed to
+	 * return $this.
 	 *
 	 * @since 5.0
 	 *