This excerpt taken from the SYT 20-F filed Mar 1, 2006.
Intangible assets other than goodwill
Intangible assets, except for goodwill, are valued at cost less accumulated amortization and any impairment losses. All intangible assets other than goodwill are assigned a finite life.
Intangible assets are amortized on a straight-line basis over the following periods:
Trademarks are amortized on a straight line basis over their estimated economic or legal life, whichever is shorter. Useful lives assigned to acquired product rights are based on the maturity of the product and the estimated economic benefit that such product rights can provide.
Any value attributable to long-term supply agreements at preferential terms is amortized as part of cost of goods sold over the period of the supply agreement.