How do the principles for amortisation of intangible assets differ from those for depreciation of property, plant

Question:

How do the principles for amortisation of differ from those for depreciation of property, plant and equipment?
Intangible Assets
An intangible asset is a resource controlled by an entity without physical substance. Unlike other assets, an intangible asset has no physical existence and you cannot touch it.Types of Intangible Assets and ExamplesSome examples are patented...