<Ul> <Li> Accounting period </Li> <Li> Accrual </Li> <Li> Constant purchasing power </Li> <Li> Economic entity </Li> <Li> Fair value </Li> <Li> Going concern </Li> <Li> Historical cost </Li> <Li> Matching principle </Li> <Li> Materiality </Li> <Li> Revenue recognition </Li> <Li> Unit of account </Li> </Ul> <Li> Constant purchasing power </Li> <Li> Unit of account </Li> <Tr> <Td> Selected accounts (show) <Ul> <Li> Assets </Li> <Li> Cash </Li> <Li> Cost of goods sold </Li> <Li> Depreciation / Amortization </Li> <Li> Equity </Li> <Li> Expenses </Li> <Li> Goodwill </Li> <Li> Liabilities </Li> <Li> Profit </Li> <Li> Revenue </Li> </Ul> </Td> </Tr>

What are the main characteristics of liabilities from an accounting perspective