ing URI references, or when you input URI references as RDF entity in the 
lisp top level window. </p>
<p class="justify">In theory, the substance of RDF can be modeled as labeled 
uni-directional graph of edge and node called RDF graph. A start node of edge is 
called <i>subject</i>, an end node is called <i>object</i>, and an edge is 
called <i>predicate</i> in <i>triple</i>. So, a triple 
<i>subject/predicate/object</i> in text stands for the minimal structure in 
graph. A set of triples in text turns ou