Turnover is measured at the fair value of the consideration received or receivable, excluding discounts, rebates, value added tax and other sales taxes.
License revenues are recognised when the licence has been delivered to the customer and no ongoing obligations exist. Support and maintenance revenues are recognised on a straight line basis over the life of the provision of those services. When license and support revenues are included in one contract, the two items are recognised on a straight line basis over the life of the provision of those services.
Turnover from the supply of services represents the value of services provided under contracts to the extent that there is a right to consideration and is recorded at the fair value of the consideration received or receivable. Where a contract has been partially completed at the balance sheet date, turnover represents the fair value of the service provided to date based on the stage of completion of the contract activity at the balance sheet date. Where payments are received from customers in advance for services provided, the amounts are recorded as deferred income and included as part of creditors.