]> 1 1 1 Resource 1 A sswap:Resource designates a semantically described web resource. Resources that "do things" for example, transform some input to some output are called services. A sswap:Resource sswap:operatesOn one or more sswap:Graphs, where the sswap:Graph acts as a data structure for the mapping of some input (sswap:Subject) to some output (sswap:Object). A resource that is a sswap:Resource has the URI of its Resource Description Graph (RDG). All sswap:Resources have a sole and unique sswap:Provider (indicated by the sswap:providedBy predicate) which claims ownership of the resource (reciprocated by the sswap:providesResource predicate). If the resource's URI is a lexical sub-path of the provider, then the provider does not have to reciprocate the sswap:providesResource claim. But if the resource is claiming ownership by a provider whose URI is not a lexical sub-path, then the provider must explicitly reciprocate the claim with sswap:providesResource. Similarly, if a provider claims a resource which is not in a sub-path, then the resource must reciprocate the claim. Required predicates: sswap:name, sswap:operatesOn, sswap:providedBy; Optional predicates: sswap:aboutURI, sswap:inputURI, sswap:metadata, sswap:oneLineDescription, sswap:outputURI. 1 1 0