diff --git a/src/Microdown-RichTextComposer-Tests/MicCodeSemanticActionTest.class.st b/src/Microdown-RichTextComposer-Tests/MicCodeSemanticActionTest.class.st
index a41961f0..662493e2 100644
--- a/src/Microdown-RichTextComposer-Tests/MicCodeSemanticActionTest.class.st
+++ b/src/Microdown-RichTextComposer-Tests/MicCodeSemanticActionTest.class.st
@@ -54,6 +54,14 @@ MicCodeSemanticActionTest >> testEmptyString [
 	self deny: (self semanticActionClass from: '') hasEntity
 ]
 
+{ #category : 'test - bogus entry' }
+MicCodeSemanticActionTest >> testFirst [
+	
+	
+	self shouldnt: [ self semanticActionClass from: 'first'] raise: MessageNotUnderstood.
+	self deny: (self semanticActionClass from: 'first') hasEntity
+]
+
 { #category : 'test - bogus entry' }
 MicCodeSemanticActionTest >> testGlobalAccess [
 
@@ -68,6 +76,21 @@ MicCodeSemanticActionTest >> testMoreSpaces [
 	self deny: (self semanticActionClass from: '    ') hasEntity
 ]
 
+{ #category : 'test - bogus entry' }
+MicCodeSemanticActionTest >> testNil [
+
+	self shouldnt: [ self semanticActionClass from: 'nil'] raise: MessageNotUnderstood.
+	self deny: (self semanticActionClass from: 'nil') hasEntity
+]
+
+{ #category : 'test - bogus entry' }
+MicCodeSemanticActionTest >> testOne [
+	
+	
+	self shouldnt: [ self semanticActionClass from: '1'] raise: MessageNotUnderstood.
+	self deny: (self semanticActionClass from: '1') hasEntity
+]
+
 { #category : 'test - bogus entry' }
 MicCodeSemanticActionTest >> testOneSpace [
 
diff --git a/src/Microdown-RichTextComposer/MicDocumentHierarchyBuilder.class.st b/src/Microdown-RichTextComposer/MicDocumentHierarchyBuilder.class.st
index 75839829..b39188a4 100644
--- a/src/Microdown-RichTextComposer/MicDocumentHierarchyBuilder.class.st
+++ b/src/Microdown-RichTextComposer/MicDocumentHierarchyBuilder.class.st
@@ -26,8 +26,9 @@ Class {
 		'class',
 		'fromClass'
 	],
-	#category : 'Microdown-RichTextComposer',
-	#package : 'Microdown-RichTextComposer'
+	#category : 'Microdown-RichTextComposer-Builder',
+	#package : 'Microdown-RichTextComposer',
+	#tag : 'Builder'
 }
 
 { #category : 'private' }
diff --git a/src/Microdown-RichTextComposer/MicRichTextComposer.class.st b/src/Microdown-RichTextComposer/MicRichTextComposer.class.st
index f9420428..93452d6f 100644
--- a/src/Microdown-RichTextComposer/MicRichTextComposer.class.st
+++ b/src/Microdown-RichTextComposer/MicRichTextComposer.class.st
@@ -586,7 +586,9 @@ MicRichTextComposer >> visitMonospace: anObject [
 				ifTrue: [ canvas 
 								includeAttribute: (TextAction new actOnClickBlock: [ sem entity browse ]) 
 								in: [ super visitMonospace: anObject ] ]
-				ifFalse: [ super visitMonospace: anObject]].  
+				ifFalse: [ 
+					"when we have `nil` we may not display it in blue"
+					super visitMonospace: anObject]].  
 ]
 
 { #category : 'visiting - list' }
diff --git a/src/Microdown-RichTextComposer/MicSemanticAction.class.st b/src/Microdown-RichTextComposer/MicSemanticAction.class.st
index 5168cbfa..99a89d09 100644
--- a/src/Microdown-RichTextComposer/MicSemanticAction.class.st
+++ b/src/Microdown-RichTextComposer/MicSemanticAction.class.st
@@ -144,7 +144,9 @@ MicSemanticAction >> getPackageOrNil [
 MicSemanticAction >> getTagOrNil [
 
 	| tagName |
-	tagName := tokens first asSymbol.
+	tagName := tokens first 
+		ifNil: [ ^ nil ]
+	 	ifNotNil: [:tn | tn asString].
 	self class packageOrganizer packages do: [ :package |
 		(tagName beginsWith: package name) ifTrue: [
 			package tags do: [ :tag |
diff --git a/src/Microdown/Microdown.class.st b/src/Microdown/Microdown.class.st
index deb4c792..a15c249c 100644
--- a/src/Microdown/Microdown.class.st
+++ b/src/Microdown/Microdown.class.st
@@ -145,13 +145,12 @@ Microdown >> parse: aStreamOrString [
 
 { #category : 'facade' }
 Microdown >> parseFile: aFile [
-		"Parse and return a document from the argument marking it with the file it is contained in. This is important for path resolution."
-		
-		| root |
-		root := MicParser parse: aFile contents. 
-		root fromFile: aFile.
-		^ root
-		
+    "Parse and return a document from the argument marking it with the file it is contained in. This is important for path resolution."
+
+    | root |
+    root := MicrodownParser parse: aFile contents.
+    root fromFile: aFile.
+    ^ root
 ]
 
 { #category : 'facade' }