General requirements of the application:

- the user interface must be accessible via web, it must be secure and must allow differentiated access depending on the type of user.
- the data must be easy to find and visualise.
- the aplication must contain the following modules: the data input module,the biding system module and the trading module.
- the biding system module will allow register users to bid on exposed products .

- the trading module will allow each user to purchase products online, via a defined payment system

- data management must be acomplished through special data extraction functionalities (extract data from databases), filtering and different data transformations in order to integrate the information in the database.