IAS 38 establishes the accounting requirements for intangible assets. An intangible asset must be identifiable, controlled by the entity through custody or legal rights, and expected to generate future economic benefits. Intangible assets are initially measured at cost and can subsequently be measured either at cost or using the revaluation model. Research costs are expensed as incurred while development costs meeting certain criteria are recognized as intangible assets. Goodwill arising from a business combination is recognized as an asset at cost while internally generated goodwill is not recognized.