Mobile Apps Terms



A11y (Accessibility)

Accessibility is one of the most important considerations in transport apps and websites. It means making an app or website accessible to users in more challenging situations and for those with disabilities. Accessibility is often referred to as A11y for short. A11Y is a numeronym (similar to an acronym) with the first and last letters of …

App store

An online shop where apps can be found and downloaded to your mobile phone. The app store for Android devices is called the Play Store. The app store for Apple devices is actually called the ‘App Store’.



CMS (Content Management System)

Software that facilitates creating, editing, organising and publishing content. Drupal and WordPress are examples of Content Management Systems that allow you to create and publish content on the Internet.



Native apps

Native apps are made specifically for certain platforms. They only run on the platforms they were built for, and are stored locally on those devices.


The multimodal data standard can transmit bus information, including routes and timetables, fares and tickets and real-time information. In 2019, the UK NeTEx profile was developed to standardise the publication of fare data within the UK bus industry for the Bus Open Data Service (BODS). NeTEx is a highly interoperable CEN standard representing various aspects …



SIRI-SM (Stop Monitoring)

A feed for the estimated time of arrival of a vehicle to a particular stop. SIRI-SM can also include further information about vehicles such as the vehicle’s location.

SIRI-SX (Situation Exchange)

SIRI-SX is a data format that allows the exchange of structured messages relating to public transport services and networks. It is commonly associated with disruption information and is used to communicate changes to customers.

SIRI-VM (Vehicle Monitoring)

Providing a map with live tracking of vehicles is possible thanks to the SIRI-VM feed. SIRI -VM can also include further information about upcoming stops, such as the vehicle’s ETA.