The vertex detector trigger data model

The aim of this note is to discuss the various issues arising from Different choices in the design of the Vertex Trigger Data Model and define a Baseline model. The pros and cons of the different choices will be presented with A recommendation of which choice constitutes the baseline solution and with a suggestion of the work plan to arrive to the final solution. This note does not try and define the definite version of the data model. However it is important to have a first version at this stage of the Vertex Trigger project.