Wikipedia
NeTEx
'''NeTEx ''' (formally Network Exchange PD CEN/TS 16614-1:2014', PD CEN/TS 16614-2:2014 and PD CEN/TS 16614-3:2014) is the CEN Technical standard for exchanging Public Transport Information as XML documents. it provides a W3C XML schema based on the Transmodel abstract model of common public transport concepts and data structures and can be used to exchange many different kinds of data between passenger information systems, including for stops, facilities, timetabling, fares. Such data can be used by both operational management systems and customer facing systems for journey planning etc.