Link platforms to Antwerpen-Centraal railway station relation
Add platform 12 to Mechelen relation
Add station node to Sint-Niklaas relation
Add platforms to Brussels Airport-Zaventem relation
Update UIC codes of railway stations according to https://irail.be
Separate platform refs via semicolon
Update STIB_MIVB stop code for Heysel - Heizel
Update STIB_MIVB stop code for Simonis
Mark underground objects as such
Make sure path is unambiguously one way for pedestrian traffic