From their site: We are the market leader in the provision of UK and European short breaks. We are part of Holidaybreak PLC, a publicly quoted leisure company. You will need to be a registered Superbreak affiliate before you can be given access to the Superbreak Web Services API.
The Article focuses on 5 Travel APIS among the 236 mashups tagged travel. These Travel APIS can be used from comparison of travel search to Flight Booking. APIs can also provide services like travel planning, route planning for auto or pedestrian, and adding maps to mobile applications.