| http://www.w3.org/ns/prov#value | - The three levels of inputs are defined as follows:Tier DescriptionLevel 1 Defined as observable inputs such as quoted prices in active markets.Level 2 Defined as inputs other than quoted prices in active markets that are either directly or indirectly observable.Level 3 Defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumpti
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