RDF Example One

This diagram shows a Digital Subject stored in some context and expressed in RDF. The RDF is shown in "graph form". The subject in question has a unique Identifier of #2345-234-6-546-3245, it also has a social security number Attribute (shown in red as SSN). Attributes are called "properties" in RDF. The literal value of this SSN property is not shown below.

"Sources"

Best practice in Higgins is that Context Provider attempt to maintain a piece of metadata called a "Source" for each Attribute. The Source is the subject (usually in some other Context) that is the authoritative source for this attribute. In the example below it is the SSA (Social Security Administration).

"TimeSpans"

Digital Subjects can optionally have associated TimeSpan objects each of which consist of two properties: "validFrom" and "validTo". A TimeSpan indicates a time duration during which this Digital Subject is valid. In the example below it is validFrom Aug 7th, 1959--the Digital Subject's birth date.