diff --git a/repository/TiddlyWiki/FedWikiItem.class.st b/repository/TiddlyWiki/FedWikiItem.class.st
index b4ce69c..33fd548 100644
--- a/repository/TiddlyWiki/FedWikiItem.class.st
+++ b/repository/TiddlyWiki/FedWikiItem.class.st
@@ -1,34 +1,34 @@
 Class {
-	#name : #FedWikiItem,
-	#superclass : #Object,
+	#name : 'FedWikiItem',
+	#superclass : 'Object',
 	#instVars : [
 		'text',
 		'id',
 		'type'
 	],
-	#category : #'TiddlyWiki-Model'
+	#category : 'TiddlyWiki-Model'
 }
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 FedWikiItem >> fromDictionary: aDictionary [ 
 	text := aDictionary at: 'text'.
 	id := aDictionary at: 'id'.
 	type := aDictionary at: 'type'.
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 FedWikiItem >> printOn: aStream [
 	super printOn: aStream.
 	aStream
 		nextPutAll: '( ',self type, ' | ', self text, ' )'
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 FedWikiItem >> text [
 	^ text
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 FedWikiItem >> type [
 	^ type
 ]
diff --git a/repository/TiddlyWiki/FedWikiPage.class.st b/repository/TiddlyWiki/FedWikiPage.class.st
index b884a92..630450d 100644
--- a/repository/TiddlyWiki/FedWikiPage.class.st
+++ b/repository/TiddlyWiki/FedWikiPage.class.st
@@ -1,6 +1,6 @@
 Class {
-	#name : #FedWikiPage,
-	#superclass : #Object,
+	#name : 'FedWikiPage',
+	#superclass : 'Object',
 	#instVars : [
 		'url',
 		'title',
@@ -8,10 +8,10 @@ Class {
 		'journal',
 		'importJournal'
 	],
-	#category : #'TiddlyWiki-Model'
+	#category : 'TiddlyWiki-Model'
 }
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 FedWikiPage >> dataDictionary [
 	| dataUrl |
 	self isView ifFalse: [
@@ -21,34 +21,34 @@ FedWikiPage >> dataDictionary [
 	^ STONJSON fromString: dataUrl asUrl retrieveContents
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 FedWikiPage >> fromDataDictionary [
 	title := self dataDictionary at: 'title'.
 	story := self dataDictionary at: 'story'.
 	self importJournal ifTrue: [ journal := self dataDictionary at: 'journal'].
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 FedWikiPage >> host [
 	^ self url host
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 FedWikiPage >> importJournal [
 	^ importJournal ifNil: [ importJournal := false ]
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 FedWikiPage >> importJournal: aBoolean [
 	importJournal := aBoolean
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 FedWikiPage >> isView [
 	^ self url firstPathSegment = 'view'
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 FedWikiPage >> jsonData [
 	| dataUrl |
 	self isView ifFalse: [
@@ -57,29 +57,29 @@ FedWikiPage >> jsonData [
 	dataUrl := self scheme , '://', self host, self titleSegmentUrl, '.json'
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 FedWikiPage >> printOn: aStream [
 	super printOn: aStream.
 	aStream
 		nextPutAll: '( ', self title, ' | ', self story size asString, ' items story )'
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 FedWikiPage >> scheme [
 	^ self url scheme
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 FedWikiPage >> story [
 	^ story
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 FedWikiPage >> title [
 	^ title.
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 FedWikiPage >> titleSegmentUrl [
 	self isView ifFalse: [
 		self inform: 'Please provide a view url for the FedWiki page.'.
@@ -87,12 +87,12 @@ FedWikiPage >> titleSegmentUrl [
 	^ self url segments last.
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 FedWikiPage >> url [
 	^ url
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 FedWikiPage >> url: aString [
 	url  := aString asZnUrl
 ]
diff --git a/repository/TiddlyWiki/Tiddler.class.st b/repository/TiddlyWiki/Tiddler.class.st
index 6acd68d..94682aa 100644
--- a/repository/TiddlyWiki/Tiddler.class.st
+++ b/repository/TiddlyWiki/Tiddler.class.st
@@ -5,8 +5,8 @@ I implement the standard fields as described in the standard documentation at: <
 
 "
 Class {
-	#name : #Tiddler,
-	#superclass : #Object,
+	#name : 'Tiddler',
+	#superclass : 'Object',
 	#instVars : [
 		'title',
 		'text',
@@ -18,18 +18,21 @@ Class {
 		'list',
 		'caption',
 		'modifier',
-		'wiki'
+		'wiki',
+		'customFields',
+		'bag',
+		'revision'
 	],
-	#category : #'TiddlyWiki-Model'
+	#category : 'TiddlyWiki-Model'
 }
 
-{ #category : #'instance creation' }
+{ #category : 'instance creation' }
 Tiddler class >> nowLocal [
 	^ (ZTimestampFormat fromString: '200102031605067') 
 			format: (ZTimestamp fromString: Time nowLocal  asDateAndTime asString)
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 Tiddler >> asDictionary [
 	^ Dictionary new
 		at: 'title' put: self title;
@@ -40,55 +43,71 @@ Tiddler >> asDictionary [
 		yourself.
 ]
 
-{ #category : #converting }
+{ #category : 'converting' }
 Tiddler >> asJson [ 
 	^ STONJSON toStringPretty: self asDictionary 
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 Tiddler >> asJsonTempFile [
 	^ MarkupFile exportAsFileOn: FileLocator temp / self title, 'json' containing:self asJson 
 		
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
+Tiddler >> bag [
+	^ bag
+]
+
+{ #category : 'accessing' }
+Tiddler >> bag: aString [
+	bag := aString
+]
+
+{ #category : 'accessing' }
 Tiddler >> caption [
 
 	^ caption
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 Tiddler >> caption: anObject [
 
 	caption := anObject
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 Tiddler >> created [
 
 	^ created ifNil: [ created := DateAndTime now ]
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 Tiddler >> created: anObject [
 
 	created := anObject
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 Tiddler >> creator [
 
 	^ creator
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 Tiddler >> creator: anObject [
 
 	creator := anObject
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
+Tiddler >> customFields [
+	^ customFields ifNil: [ customFields := Dictionary new]
+]
+
+{ #category : 'accessing' }
 Tiddler >> fromDictionary: aDictionary [
+	| customKeys |
 	self
 		title: (aDictionary at: 'title');
 		text: (aDictionary at: 'text');
@@ -99,9 +118,16 @@ Tiddler >> fromDictionary: aDictionary [
 		modifier: (aDictionary at: 'modifier' ifAbsentPut: [ nil ]);
 		type: (aDictionary at: 'type' ifAbsentPut: [ nil ]);
 		caption: (aDictionary at: 'caption' ifAbsentPut: [ nil ]).
+	self	
+		bag: (aDictionary at: 'bag');
+		revision: (aDictionary at: 'revision' ifAbsentPut: [ nil ]).
+	customKeys := aDictionary keys copyWithoutAll: (self class instanceVariables collect: [ :each | each name ]).
+	customKeys ifEmpty: [ ^ self ].
+	customKeys do: [:key |
+		self customFields at: key put: (aDictionary at: key) ].
 ]
 
-{ #category : #'instance creation' }
+{ #category : 'instance creation' }
 Tiddler >> fromMarkdownParsedItems: aCollection [
 	| outputStream |
 	outputStream := '' writeStream.
@@ -114,7 +140,7 @@ Tiddler >> fromMarkdownParsedItems: aCollection [
 	]
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 Tiddler >> importFedWikiPage: pageViewUrlString [
 	| pageTitle pageViewUrl pageData |
 	pageViewUrl := pageViewUrlString asZnUrl.
@@ -123,7 +149,7 @@ Tiddler >> importFedWikiPage: pageViewUrlString [
 	^ STONJSON fromString: pageData retrieveContents	
 ]
 
-{ #category : #utilities }
+{ #category : 'utilities' }
 Tiddler >> itemContentsStringFor: item into: stream [
 	stream 
 		nextPutAll: item text;
@@ -131,7 +157,7 @@ Tiddler >> itemContentsStringFor: item into: stream [
 		nextPut: Character cr
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 Tiddler >> linkedTiddlers [
 	"At the begining we are going to introduce 'pureTiddlers' as thos included in the wiki which are not linked
 	via aliases. Future versions of this method sould included internal aliased tiddlers."
@@ -140,19 +166,19 @@ Tiddler >> linkedTiddlers [
 	^ self wiki tiddlers select: [:tiddler | pureTiddlersTitles includes: tiddler title ].
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 Tiddler >> list [
 
 	^ list
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 Tiddler >> list: anObject [
 
 	list := anObject
 ]
 
-{ #category : #utilities }
+{ #category : 'utilities' }
 Tiddler >> markdownLinksAsWikiText [
 	"I'm useful to convert _internal_ links between formats, as is a common pattern
 	found when migrating content from Markdown to TiddlyWiki's WikiText.
@@ -166,101 +192,111 @@ Tiddler >> markdownLinksAsWikiText [
 	^ markdownLinks
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 Tiddler >> modified [
 
 	^ modified
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 Tiddler >> modified: anObject [
 
 	modified := anObject
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 Tiddler >> modifier [
 
 	^ modifier
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 Tiddler >> modifier: anObject [
 
 	modifier := anObject
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 Tiddler >> printOn: aStream [
 	super printOn: aStream.
 	aStream
 		nextPutAll: '( ', self title, ' )'
 ]
 
-{ #category : #'as yet unclassified' }
+{ #category : 'as yet unclassified' }
 Tiddler >> rawAliasedLinks [
 	^ self rawLinks select: [ :each | each includesSubstring: '|'	 ]
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 Tiddler >> rawLinks [
 	^ (WikiTextGrammar new linkSea star parse: self text) asSet
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
+Tiddler >> revision [
+	^ revision
+]
+
+{ #category : 'accessing' }
+Tiddler >> revision: aNumberString [
+	revision := aNumberString
+]
+
+{ #category : 'accessing' }
 Tiddler >> tags [
 
 	^ tags
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 Tiddler >> tags: anObject [
 
 	tags := anObject
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 Tiddler >> text [
 
 	^ text
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 Tiddler >> text: anObject [
 
 	text := anObject
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 Tiddler >> title [
 
 	^ title
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 Tiddler >> title: anObject [
 
 	title := anObject
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 Tiddler >> type [
 
 	^ type
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 Tiddler >> type: anObject [
 
 	type := anObject
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 Tiddler >> wiki [
 	^ wiki
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 Tiddler >> wiki: aTiddlyWiki [
 	wiki := aTiddlyWiki
 ]
diff --git a/repository/TiddlyWiki/TiddlyWiki.class.st b/repository/TiddlyWiki/TiddlyWiki.class.st
index da96a10..c7be54b 100644
--- a/repository/TiddlyWiki/TiddlyWiki.class.st
+++ b/repository/TiddlyWiki/TiddlyWiki.class.st
@@ -5,26 +5,26 @@ More information:
 https://tiddlywiki.com/
 "
 Class {
-	#name : #TiddlyWiki,
-	#superclass : #Object,
+	#name : 'TiddlyWiki',
+	#superclass : 'Object',
 	#instVars : [
 		'tiddlers',
 		'file'
 	],
-	#category : #'TiddlyWiki-Model'
+	#category : 'TiddlyWiki-Model'
 }
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 TiddlyWiki >> file [
 	^ file
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 TiddlyWiki >> file: anObject [
 	file := anObject
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 TiddlyWiki >> importJSONTiddlers [
 	| tiddlersDict |
 	self tiddlersJSONFile ifNil: [ ^ self ].
@@ -36,7 +36,7 @@ TiddlyWiki >> importJSONTiddlers [
 		 ])
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 TiddlyWiki >> networkView [
 	| view |
 	view := GtMondrian new.
@@ -48,33 +48,33 @@ TiddlyWiki >> networkView [
 	^ view
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 TiddlyWiki >> printOn: aStream [
 	super printOn: aStream.
 	aStream
 		nextPutAll: '( ', self file basename ,' )'
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 TiddlyWiki >> taggedWith: aTag [
 	^ self tiddlers select: [:tiddler | 
 		tiddler tags isNotNil and: [tiddler tags includesSubstring: aTag ]
 	]
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 TiddlyWiki >> tiddlers [
 
 	^ tiddlers ifNil: [ tiddlers := OrderedCollection new ]
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 TiddlyWiki >> tiddlers: anOrderedCollection [
 
 	tiddlers := anOrderedCollection
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 TiddlyWiki >> tiddlersJSONFile [
 	file ifNil: [ self inform: 'You need to export tiddlers as JSON from TiddlyWiki'. 
 		^ nil ].
diff --git a/repository/TiddlyWiki/WikiText.class.st b/repository/TiddlyWiki/WikiText.class.st
index 39c063a..7f05e24 100644
--- a/repository/TiddlyWiki/WikiText.class.st
+++ b/repository/TiddlyWiki/WikiText.class.st
@@ -1,34 +1,34 @@
 Class {
-	#name : #WikiText,
-	#superclass : #Object,
+	#name : 'WikiText',
+	#superclass : 'Object',
 	#instVars : [
 		'content'
 	],
-	#category : #'TiddlyWiki-Model'
+	#category : 'TiddlyWiki-Model'
 }
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 WikiText >> content [
 	^ content
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 WikiText >> content: aString [
 	content := aString
 ]
 
-{ #category : #conversions }
+{ #category : 'conversions' }
 WikiText >> converMarkdownBold [
 	self content: (self content copyReplaceAll: '**' with: '''''').
 ]
 
-{ #category : #conversions }
+{ #category : 'conversions' }
 WikiText >> convertMarkdownBold [
 	self content: (self content copyReplaceAll: '**' with: '''''').
 	^ self.
 ]
 
-{ #category : #conversions }
+{ #category : 'conversions' }
 WikiText >> convertMarkdownLinks [
 	| markdownLinks markdownLinksRegex |
 	markdownLinksRegex := '\[([\w|\s]+)\]\((\S+)\)'.
@@ -44,7 +44,7 @@ WikiText >> convertMarkdownLinks [
 	^ self content
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 WikiText >> sample [
 	^ 'The ''quick'' brown ~~flea~~ fox //jumps// over the `lazy` dog.
 	
diff --git a/repository/TiddlyWiki/WikiTextGrammar.class.st b/repository/TiddlyWiki/WikiTextGrammar.class.st
index b7a61fb..338b88b 100644
--- a/repository/TiddlyWiki/WikiTextGrammar.class.st
+++ b/repository/TiddlyWiki/WikiTextGrammar.class.st
@@ -1,6 +1,6 @@
 Class {
-	#name : #WikiTextGrammar,
-	#superclass : #PP2CompositeNode,
+	#name : 'WikiTextGrammar',
+	#superclass : 'PP2CompositeNode',
 	#instVars : [
 		'document',
 		'link',
@@ -8,40 +8,40 @@ Class {
 		'linkContent',
 		'linkClose'
 	],
-	#category : #'TiddlyWiki-Model'
+	#category : 'TiddlyWiki-Model'
 }
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 WikiTextGrammar >> document [
 	^ link islandInSea star
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 WikiTextGrammar >> link [
 	^ linkOpen, linkContent, linkClose ==> #second
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 WikiTextGrammar >> linkClose [
 	^ ']]' asPParser
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 WikiTextGrammar >> linkContent [
 	^ #any asPParser starLazy flatten
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 WikiTextGrammar >> linkOpen [
 	^ '[[' asPParser
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 WikiTextGrammar >> linkSea [
 	^ link sea ==> #second
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 WikiTextGrammar >> start [
 	^ document
 ]
diff --git a/repository/TiddlyWiki/WikiTextGrammarTest.class.st b/repository/TiddlyWiki/WikiTextGrammarTest.class.st
index 9113c7b..1800252 100644
--- a/repository/TiddlyWiki/WikiTextGrammarTest.class.st
+++ b/repository/TiddlyWiki/WikiTextGrammarTest.class.st
@@ -1,15 +1,15 @@
 Class {
-	#name : #WikiTextGrammarTest,
-	#superclass : #PP2CompositeNodeTest,
-	#category : #'TiddlyWiki-Model'
+	#name : 'WikiTextGrammarTest',
+	#superclass : 'PP2CompositeNodeTest',
+	#category : 'TiddlyWiki-Model'
 }
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 WikiTextGrammarTest >> parserClass [
 	^ WikiTextGrammar
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 WikiTextGrammarTest >> testDocument [
 	| input |
 	input := WikiText new sample.
@@ -17,7 +17,7 @@ WikiTextGrammarTest >> testDocument [
 	self assert: result size equals: 2
 ]
 
-{ #category : #accessing }
+{ #category : 'accessing' }
 WikiTextGrammarTest >> testLink [
 	self
 		parse: '[[Just testing]]'
diff --git a/repository/TiddlyWiki/package.st b/repository/TiddlyWiki/package.st
index e18b041..8685590 100644
--- a/repository/TiddlyWiki/package.st
+++ b/repository/TiddlyWiki/package.st
@@ -1 +1 @@
-Package { #name : #TiddlyWiki }
+Package { #name : 'TiddlyWiki' }