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Sigma KEE - UniformResourceIdentifier
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统一资源标识符
A UniformResourceIdentifier (URI) is a compact string of characters for identifying an abstract or physical resource. A URI can be further classified as a locator, a name, or both (source: http://www.ietf.org/rfc/rfc2396.txt).
Relationships      
Parents 有内用物体 Any SelfConnectedObject that expresses content. This content may be a Proposition, e.g. when the ContentBearingObject is a Sentence or Text, or it may be a representation of an abstract or physical object, as with an Icon, a Word or a Phrase.
Children 统一资源定位器The term UniformResourceLocator (URL) refers to the subset of URI that identify resources via a representation of their primary access mechanism (e.g., their network location), rather than identifying the resource by name or by some other attribute(s) of that resource (source: http://www.ietf.org/rfc/rfc2396.txt).
 统一资源名称The term UniformResourceName (URN) refers to the subset of URI that are required to remain globally unique and persistent even when the resource ceases to exist or becomes unavailable (source: http://www.ietf.org/rfc/rfc2396.txt).


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