EN/CityGML-Tutorial/chapter-1:-Intro-CityGML.md

@@ -59,7 +59,13 @@ The XML encoding of the UML diagram is defined in an XML schema. In CityGML 2.0,
 
 In CityGML 3.0, only the UML model is defined in the conceptual model standard document. Unlike CityGML 2.0 multiple encodings can exist for CityGML 3.0 to encode the conceptual (UML) model. One encoding is the [XML](https://github.com/opengeospatial/CityGML-3.0Encodings/tree/master/Moved_to_CITYGML-3.0Encoding_CityGML) encoding. A free Java tool to convert datasets from CityGML 2.0 to CityGML 3.0 is available [here](https://github.com/tum-gis/citygml2-to-citygml3). Other encodings such as CityDotNet, CityJSON, CitySQL are under [development](https://github.com/opengeospatial/CityGML-3.0Encodings).
 
-Both CityGML 2.0 and CityGML 3.0 (XML encoding) are XML based file format hence they can be easily viewed in any XML editor such as [Notepad ++](https://notepad-plus-plus.org/downloads/) and also using a free 3D GIS / BIM viewer - FZK Viewer (https://www.iai.kit.edu/1648.php). For am extensive list of other tools supporting CityGML, visit [here](https://transfer.hft-stuttgart.de/gitlab/coors/3d-stadtmodelle/-/wikis/home).
+Both CityGML 2.0 and CityGML 3.0 (XML encoding) are XML based file format hence they can be easily viewed in any XML editor such as [Notepad ++](https://notepad-plus-plus.org/downloads/) and also using a free 3D GIS / BIM viewer - [FZK Viewer](https://www.iai.kit.edu/1648.php). For am extensive list of other tools supporting CityGML, visit [here](https://transfer.hft-stuttgart.de/gitlab/coors/3d-stadtmodelle/-/wikis/home).
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 > Currently FZK viewer completely supports CityGML 2.0 but only partially support CityGML 3.0 (Elements of CityGML 2.0 are supported but new elements of CityGML 3.0 are not supported). An update to FZK viewer which fully supports CityGML 3.0 is under development.
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