]> POWDER-S Vocabulary This file specifies the set of classes and properties used in the RDF/OWL version of POWDER documents. 2 June 2017 2009-09-01 2010-11-08 2017-06-02 wdrs &wdrs; POWDER document A POWDER document. POWDER processor A software agent able to process POWDER documents. text that may be displayed This property provides a summary of the descriptorset that it annotates, suitable for display to end users. issued by This property denotes the author of a POWDER document. matches regular expression This is the key 'include' property for IRI set definitions in POWDER-S. It is necessary to take account of the POWDER Semantic Extension to process this fully. The value is a regular expression that is matched against an IRI. matches regular expression This is the key 'exclude' property for IRI set definitions in POWDER-S. It is necessary to take account of the POWDER Semantic Extension to process this fully. The value is a regular expression that is matched against an IRI. has IRI This property is meant to be used in OWL2 instead of wdrs:matchesregex. It denotes the string data range corresponding to a set of IRIs. tag Property linking to a free-text tag which may include spaces. not known to Property used in results returned from a POWDER Processor that has no data about the candidate resource. The value is the IRI of the processor. described by An RDF property to exactly match the describedby relationship type introduced in http://www.w3.org/TR/powder-dr/#assoc-linking and formally defined in appendix D of the same document, i.e. the relationship A 'describedby' B asserts that resource B provides a description of resource A. There are no constraints on the format or representation of either A or B, neither are there any further constraints on either resource. authenticate A pointer to a document that describes how Description Resources created by a FOAF Agent or a DC Terms Agent may be authenticated valid from Provides a timestamp that a POWDER Processor may use when assessing trustworthiness of a POWDER document. Informally, a POWDER Processor should normally ignore data in the document before the given date. valid until Provides a timestamp that a POWDER Processor may use when assessing trustworthiness of a POWDER document. Informally, a POWDER Processor should normally ignore data in the document after the given date. logo Points to a graphic summary for the resources in a given class. Typically, it is a logo denoting conformance of a given (set of) resource(s) to a given set of criteria. SHA-1 sum Links to a Base64-encoded binary SHA-1 hash of the described resource. May be used by POWDER Processors when assessing trustworthiness of a DR. certified A property that takes a Boolean value to declare whether the author of the data certifies the described resource. certified by A property that links a resource to a POWDER document that certifies it. supported by A property that links a POWDER document to some other data source that supports the descriptions provided. data error A property denoting a description of the specific error found in a given POWDER document. processing error A property denoting a description of the specific software error. error code A property denoting the code of any error encountered by the POWDER processor.