I have my own classification for Stops/ Lines / etc. Can NeTEx handle this?

Yes, NeTEx allow arbitrary user defined code classifications for elements using the has TYPE OF STOP, TYPE OF LINE and other ‘Type of Entity’ elements that . In addition NeTEx, to encourage standardised use, also provides fixed enumerations of many commonly found classifications of specific elements, including types of equipment, on-board facilities, etc. The ‘Key Value’ extension mechanism allows Also allows additional user defined attributes to be added, which can include classifiers.