Resource Form of the Commons
From the Commons - Typology of Stefan Meretz :
"The production of goods requires resources. Though sometimes nothing is produced, already existing resources are used and maintained. In this case the resource itself is the good, which is considered to be preserved—for instance a lake. We can usually find some mixed case , because no produced good can go without the resource of knowledge which has been created and disposed by others. By resources, we generally understand non humans sources .
In the illustration, natural and produced resources are distinguished. Natural resources are already existing and raw resources which, however, are seldom found in uninfluenced environments. Produced resources are material or non-material created preconditions for further use in the production of goods or resources in the broadest sense." (http://www.keimform.de/2010/01/11/commons-in-a-taxonomy-of-goods/)