Virtual Data Models in Anticipatory System of Railway Transportation

The application of Data Warehouse technologies allows constructing the set of prediction models of the railway transportation on the basis of the huge amount of the accumulated data. The big size of the disk space is necessary for these models allocation, therefore the method of the virtual data models is offered. The period of life of the created models is not limited in time, they do not influence the real data, and they do not occupy the place on the storage devices. The examined virtual data models are developed within the frames of the creation of the Decision Support System of Latvian Railway. However the received results have a universal character.