HTML and CSS Reference
As a result, the tool provides the full list of subject-predicate-object triples retrieved from the file (Figure 14-15 ).
The output format can also be changed to N-triples or RDF/XML.
Figure 14-15. Semantic data extraction in progress
The “Sigma” option is a really good demonstration of machine-readable metadata. Software tools can extract
structured data from properly written semantic documents and display them arbitrarily (Figure 14-16 ). This is the true
essence of the Semantic Web!