diff --git a/src/MiniDocs/LeDatabase.extension.st b/src/MiniDocs/LeDatabase.extension.st
new file mode 100644
index 0000000..7017951
--- /dev/null
+++ b/src/MiniDocs/LeDatabase.extension.st
@@ -0,0 +1,43 @@
+Extension { #name : #LeDatabase }
+
+{ #category : #'*MiniDocs' }
+LeDatabase >> addPageFromMarkdeepUrl: aString [
+
+	| page |
+	page := self detectLocalPageForRemote: aString.
+	page ifNotNil: [ :arg | ^ self importErrorMessage: page ].
+	self addPage: page.
+]
+
+{ #category : #'*MiniDocs' }
+LeDatabase >> detectLocalPageForRemote: markdeepDocUrl [
+	| markdeepHelper id remoteMetadata docTree |
+	markdeepHelper := Markdeep new.
+	docTree := (XMLHTMLParser on: markdeepDocUrl asUrl retrieveContents) parseDocument.
+	remoteMetadata := markdeepHelper metadataFromXML: docTree.
+	id := remoteMetadata at: 'id' ifAbsent: [ ^ false ].
+	^ self pageWithID: id ifAbsent: [ nil ].
+]
+
+{ #category : #'*MiniDocs' }
+LeDatabase >> importErrorMessage: page [
+
+	^ String streamContents: [ :stream | 
+		  stream
+			  nextPutAll: 'IMPORTATION ERROR: a page with';
+			  nextPut: Character lf;
+			  nextPut: Character lf;
+			  nextPutAll: ' id: ' , page uidString;
+			  nextPut: Character lf;
+			  nextPutAll: ' title: ' , page contentAsString;
+			  nextPut: Character lf;
+			  nextPut: Character lf;
+			  nextPutAll: 'already exists in this database.';
+			  nextPut: Character lf;
+			  nextPut: Character lf;
+			  nextPutAll:
+				  'Please do one of those before retrying this procedure:
+		
+		1) Move the existing page files (.lepiter and .bak) to another (sub)folder.
+		2) Import the page url to another database.' ]
+]