diff --git a/src/Famix-Java-Entities/FamixJavaEntity.class.st b/src/Famix-Java-Entities/FamixJavaEntity.class.st
index 21158ffb..c1999112 100644
--- a/src/Famix-Java-Entities/FamixJavaEntity.class.st
+++ b/src/Famix-Java-Entities/FamixJavaEntity.class.st
@@ -77,6 +77,13 @@ FamixJavaEntity >> isException [
 	^ false
 ]
 
+{ #category : #testing }
+FamixJavaEntity >> isFileAnchor [
+
+	<generated>
+	^ false
+]
+
 { #category : #testing }
 FamixJavaEntity >> isImplicitVariable [
 
diff --git a/src/Famix-MetamodelGeneration/FamixGenerator.class.st b/src/Famix-MetamodelGeneration/FamixGenerator.class.st
index 9a0c21c3..47aea67e 100644
--- a/src/Famix-MetamodelGeneration/FamixGenerator.class.st
+++ b/src/Famix-MetamodelGeneration/FamixGenerator.class.st
@@ -1622,6 +1622,7 @@ FamixGenerator >> defineTraits [
 
 	tFileAnchor := builder newTraitNamed: #TFileAnchor.
 	tFileAnchor comment: self commentForTFileAnchor.
+	tFileAnchor withTesting.
 
 	tFileNavigation := builder newTraitNamed: #TFileNavigation.
 	tFileNavigation comment: self commentForTFileNavigation.
diff --git a/src/Famix-Test1-Entities/FamixTest1Entity.class.st b/src/Famix-Test1-Entities/FamixTest1Entity.class.st
index e7899ef7..f2c73ea6 100644
--- a/src/Famix-Test1-Entities/FamixTest1Entity.class.st
+++ b/src/Famix-Test1-Entities/FamixTest1Entity.class.st
@@ -56,6 +56,13 @@ FamixTest1Entity >> isClass [
 	^ false
 ]
 
+{ #category : #testing }
+FamixTest1Entity >> isFileAnchor [
+
+	<generated>
+	^ false
+]
+
 { #category : #testing }
 FamixTest1Entity >> isMethod [
 
diff --git a/src/Famix-Traits/FamixTFileAnchor.trait.st b/src/Famix-Traits/FamixTFileAnchor.trait.st
index 9424d435..926dbe48 100644
--- a/src/Famix-Traits/FamixTFileAnchor.trait.st
+++ b/src/Famix-Traits/FamixTFileAnchor.trait.st
@@ -131,6 +131,8 @@ FamixTFileAnchor >> isContiguousWith: anotherFileAnchor [
 
 { #category : #testing }
 FamixTFileAnchor >> isFileAnchor [
+
+	<generated>
 	^ true
 ]
 
diff --git a/src/Moose-Core-Tests/FamixTest3ModelTest.class.st b/src/Moose-Core-Tests/FamixTest3ModelTest.class.st
index 3d5b1ef9..97c7a039 100644
--- a/src/Moose-Core-Tests/FamixTest3ModelTest.class.st
+++ b/src/Moose-Core-Tests/FamixTest3ModelTest.class.st
@@ -14,12 +14,14 @@ FamixTest3ModelTest >> actualClass [
 
 { #category : #tests }
 FamixTest3ModelTest >> testExport [
-	self assert: (String streamContents: [ :s | group exportTo: s ]) equals: '()'.
+
+	self
+		assert: (String streamContents: [ :s | group exportToMSEStream: s ])
+		equals: '()'.
 	group add: (FamixTest3Class named: 'Foo').
 	self
-		assert: (String streamContents: [ :s | group exportTo: s ])
-		equals:
-			'(
+		assert: (String streamContents: [ :s | group exportToMSEStream: s ])
+		equals: '(
 	(Famix-Test3-Entities.Class (id: 1)
 		(name ''Foo'')
 		(isStub false)
diff --git a/src/Moose-Core-Tests/MooseModelTest.class.st b/src/Moose-Core-Tests/MooseModelTest.class.st
index de60edd8..ef8b060e 100644
--- a/src/Moose-Core-Tests/MooseModelTest.class.st
+++ b/src/Moose-Core-Tests/MooseModelTest.class.st
@@ -115,8 +115,10 @@ MooseModelTest >> testDifferenceWithRealCollection [
 ]
 
 { #category : #tests }
-MooseModelTest >> testExportMetamodelTo [
-	self denyEmpty: (String streamContents: [ :s | group exportMetamodelTo: s ])
+MooseModelTest >> testExportMetamodelToMSEStream [
+
+	self denyEmpty:
+		(String streamContents: [ :s | group exportMetamodelToMSEStream: s ])
 ]
 
 { #category : #tests }
diff --git a/src/Moose-Core/MooseModel.class.st b/src/Moose-Core/MooseModel.class.st
index 02091c1d..057a60f9 100644
--- a/src/Moose-Core/MooseModel.class.st
+++ b/src/Moose-Core/MooseModel.class.st
@@ -64,25 +64,32 @@ MooseModel class >> developerToolsMenuLabel [
 ]
 
 { #category : #'import-export' }
-MooseModel class >> export: aModel to: aStream [ 
-	aModel exportTo: aStream
-]
+MooseModel class >> export: aModel to: aStream [
 
-{ #category : #'import-export' }
-MooseModel class >> export: aModel withMetamodel: aMetamodel to: aStream [
-	aModel exportWithMetamodel: aMetamodel to: aStream
+	self
+		deprecated:
+			'This method is not used and will be removed in the next Moose version. 
+Please use an instance side method instead. 
+The default export is done in a MSE format. JSON is also available'
+		transformWith: '`@modelClass export: `@model to: `@stream'
+			-> '`@model exportToMSEStream: `@stream'.
+
+	aModel exportToMSEStream: aStream
 ]
 
 { #category : #'import-export' }
-MooseModel class >> exportMetamodel: aMetamodel to: aStream [ 
+MooseModel class >> exportMetamodel: aMetamodel to: aStream [
 
-	aMetamodel exportOn: aStream
-]
+	self
+		deprecated:
+			'This method is not used and will be removed in the next Moose version. 
+Please use an instance side method instead.
+The default export is done in a MSE format. JSON is also available'
+		transformWith:
+			'`@modelClass exportMetamodel: `@metamodel to: `@stream'
+			-> '`@metamodel exportMetamodelToMSEStream: `@stream'.
 
-{ #category : #'import-export' }
-MooseModel class >> exportMetamodelTo: aStream [
-	self deprecated: 'Use exportMetamodelTo: in instance side'.
-	self exportMetamodel: self metamodel to: aStream
+	aMetamodel exportMetamodelToMSEStream: aStream
 ]
 
 { #category : #accessing }
@@ -389,12 +396,10 @@ MooseModel >> allRootContainers [
 	^ self allModelContainers select: #isRoot
 ]
 
-{ #category : #actions }
+{ #category : #'import-export' }
 MooseModel >> asMSEString [
-	| stream |
-	stream := (String new: 1024) writeStream.
-	self exportToMSEStream: stream.
-	^ stream contents
+
+	^ String streamContents: [ :stream | self exportToMSEStream: stream ]
 ]
 
 { #category : #groups }
@@ -430,15 +435,13 @@ MooseModel >> deadCodeRate [
 		computedAs: [ self allBehaviouralsWithDeadCode size / self allModelBehaviourals size ]
 ]
 
-{ #category : #actions }
+{ #category : #'import-export' }
 MooseModel >> detectEncodingOfAllFileAnchors [
+
 	"I can be execute to reduce the time of detection of the encoding of each file anchor because multiple file anchor can point to the same file."
 
-	(((self select: [ :entity |
-		   [ entity isFileAnchor ]
-			   on: MessageNotUnderstood
-			   do: [ false ] ]) asOrderedCollection reject: #privateHasEncoding)
-		 groupedBy: #fileName) valuesDo: [ :anchors |
+	(((self allUsing: FamixTFileAnchor) asOrderedCollection reject:
+		  #privateHasEncoding) groupedBy: #fileName) valuesDo: [ :anchors |
 		| encoding |
 		encoding := anchors anyOne detectEncoding.
 		anchors do: [ :anchor | anchor encoding: encoding ] ]
@@ -454,70 +457,55 @@ MooseModel >> difference: aGroup [
 ]
 
 { #category : #'import-export' }
-MooseModel >> exportMetamodel: aMetamodel to: aStream [
+MooseModel >> exportMetamodelTo: aStream [
+
+	self
+		deprecated: 'Renamed to specify the format.'
+		transformWith: '`@receiver exportMetamodelTo: `@arg'
+			-> '`@receiver exportMetamodelToMSEStream: `@arg'.
 
-	self class exportMetamodel: aMetamodel to: aStream
+	self metamodel exportMetamodelToMSEStream: aStream
 ]
 
 { #category : #'import-export' }
-MooseModel >> exportMetamodelTo: aStream [
-	self exportMetamodel: self metamodel to: aStream
+MooseModel >> exportMetamodelToMSEStream: aStream [
+
+	self metamodel exportToMSEStream: aStream
 ]
 
 { #category : #'import-export' }
 MooseModel >> exportTo: aStream [
-	self exportWithMetamodel: self metamodel to: aStream
-]
 
-{ #category : #'import-export' }
-MooseModel >> exportTo: aStream usingPrinter: aPrinter [
-	self exportWithMetamodel: self metamodel to: aStream usingPrinter: aPrinter
+	self
+		deprecated:
+		'Please specify the format you want to export to. Default is MSE. JSON is also available.'
+		transformWith:
+		'`@model exportTo: `@stream'
+		-> '`@model exportToMSEStream: `@stream'.
+
+	self exportToMSEStream: aStream
 ]
 
-{ #category : #actions }
+{ #category : #'import-export' }
 MooseModel >> exportToJSONStream: aStream [
-	"Benchmarks on Network packages
-		Time millisecondsToRun: [ self exportToMSEStream: (StandardFileStream forceNewFileNamed: 'network.mse') ]
-		34408ms -> simon.denier 9/11/2009 11:12 - initial run
-		35527ms -> simon.denier 9/11/2009 11:51 - IdentityHashSet in FMRepository#elements, worse?
-		rewind
-		32236ms -> simon.denier 9/11/2009 17:46 - IdentityHashTable in FMRepositoryVisitor, a bit better but not much
-		30963ms -> simon.denier 9/15/2009 12:28 - cache for roots (UI process)
-		24661ms -> simon_denier 9/21/2009 22:32 - removing metrics from MSE
-	"
 
 	self detectEncodingOfAllFileAnchors.
-	self exportTo: aStream usingPrinter: FMJSONPrinter
+	self exportWithMetamodelUsingPrinter: (FMJSONPrinter on: aStream)
 ]
 
-{ #category : #actions }
+{ #category : #'import-export' }
 MooseModel >> exportToMSEStream: aStream [
-	"Benchmarks on Network packages
-		Time millisecondsToRun: [ self exportToMSEStream: (StandardFileStream forceNewFileNamed: 'network.mse') ]
-		34408ms -> simon.denier 9/11/2009 11:12 - initial run
-		35527ms -> simon.denier 9/11/2009 11:51 - IdentityHashSet in FMRepository#elements, worse?
-		rewind
-		32236ms -> simon.denier 9/11/2009 17:46 - IdentityHashTable in FMRepositoryVisitor, a bit better but not much
-		30963ms -> simon.denier 9/15/2009 12:28 - cache for roots (UI process)
-		24661ms -> simon_denier 9/21/2009 22:32 - removing metrics from MSE
-	"
 
 	self detectEncodingOfAllFileAnchors.
-	self exportTo: aStream usingPrinter: FMMSEPrinter
+	self exportWithMetamodelUsingPrinter: (FMMSEPrinter on: aStream)
 ]
 
 { #category : #'import-export' }
-MooseModel >> exportWithMetamodel: aMetamodel to: aStream [
-	(FMModel withMetamodel: aMetamodel)
-		addAll: self entities;
-		exportOn: aStream usingPrinter: FMMSEPrinter
-]
+MooseModel >> exportWithMetamodelUsingPrinter: aPrinter [
 
-{ #category : #'import-export' }
-MooseModel >> exportWithMetamodel: aMetamodel to: aStream usingPrinter: aPrinter [
-	(FMModel withMetamodel: aMetamodel)
+	(FMModel withMetamodel: self metamodel)
 		addAll: self entities;
-		exportOn: aStream usingPrinter: aPrinter
+		exportWithPrinter: aPrinter
 ]
 
 { #category : #accessing }
@@ -532,14 +520,14 @@ MooseModel >> flushPrivateState [
 	self entities do: #flush displayingProgress: [ :entity | 'Cleaning cache of ' , entity mooseName ]
 ]
 
-{ #category : #actions }
+{ #category : #'import-export' }
 MooseModel >> importFrom: aFMModel named: aString [
 
 	self silentlyAddAll: aFMModel elements.
 	self name: aString
 ]
 
-{ #category : #'as yet unclassified' }
+{ #category : #'import-export' }
 MooseModel >> importFromJSON [
 
 	| file |
@@ -555,7 +543,7 @@ MooseModel >> importFromJSON [
 		stream close ]
 ]
 
-{ #category : #actions }
+{ #category : #'import-export' }
 MooseModel >> importFromJSONStream: aStream [
 
 	"Benchmarks
@@ -572,7 +560,7 @@ MooseModel >> importFromJSONStream: aStream [
 		  named: (aStream localName removeSuffix: '.json')
 ]
 
-{ #category : #actions }
+{ #category : #'import-export' }
 MooseModel >> importFromJSONStream: aStream filteredBy: anImportingContext [
 
 	^ self
@@ -599,7 +587,7 @@ MooseModel >> importFromMSE [
 		stream close ]
 ]
 
-{ #category : #actions }
+{ #category : #'import-export' }
 MooseModel >> importFromMSEStream: aStream [
 
 	"Benchmarks
@@ -616,7 +604,7 @@ MooseModel >> importFromMSEStream: aStream [
 		  named: (aStream localName removeSuffix: '.mse')
 ]
 
-{ #category : #actions }
+{ #category : #'import-export' }
 MooseModel >> importFromMSEStream: aStream filteredBy: anImportingContext [
 
 	^ self