<https://www.aitgmbh.de/blog/tfs-devops/planning-and-estimating-the-ait-wall-estimation-extension/#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.aitgmbh.de/blog/tfs-devops/planning-and-estimating-the-ait-wall-estimation-extension/>