Not a lot of people outside the core Semantic Web community actually want to create RDF, but extracting it from what's already there can be useful for a wide variety of projects. (RSS and Atom are first and relatively easy steps that direction.)
Terminal dump
chimezie@Zion:~/devel/grddl-hg$ python GRDDL.py --debug --output-format=n3 --zone=https:--ns=aowl=http://bblfish.net/work/atom-owl/2006-06-06/# --ns=iana=http://www.iana.org/assignments/relation/ --ns=some-blog=http://example.org/2003/12/13/ https://sommer.dev.java.net/atom/2006-06-06/transform/atom-grddl.xml
binding foaf to http://xmlns.com/foaf/0.1/
binding owl to http://www.w3.org/2002/07/owl#
binding iana to http://www.iana.org/assignments/relation/
binding rdfs to http://www.w3.org/2000/01/rdf-schema#
binding wot to http://xmlns.com/wot/0.1/
binding dc to http://purl.org/dc/elements/1.1/
binding aowl to http://bblfish.net/work/atom-owl/2006-06-06/#
binding rdf to http://www.w3.org/1999/02/22-rdf-syntax-ns#
binding some-blog to http://example.org/2003/12/13/
Attempting a comprehensive glean of https://sommer.dev.java.net/atom/2006-06-06/transform/atom-grddl.xml
@@fetching: https://sommer.dev.java.net/atom/2006-06-06/transform/atom-grddl.xml
@@ignoring types: ('application/rdf+xml', 'application/xml', 'text/xml', 'application/xhtml+xml', 'text/html')
applying transformation https://sommer.dev.java.net/atom/2006-06-06/transform/atom2turtle_xslt-1.0.xsl
@@fetching: https://sommer.dev.java.net/atom/2006-06-06/transform/atom2turtle_xslt-1.0.xsl
@@ignoring types: ('application/xml',)
Parsed 22 triples as Notation 3
Attempting a comprehensive glean of http://www.w3.org/2005/AtomVia atom2turtle_xslt-1.0.xslt and Atom OWL: The GRDDL result document:
@prefix aowl: <http://bblfish.net/work/atom-owl/2006-06-06/#>.
@prefix iana: <http://www.iana.org/assignments/relation/>.
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>.
@prefix some-blog: <http://example.org/2003/12/13/>.
[ a aowl:Feed;
aowl:author [ a aowl:Person;
aowl:name "John Doe"];
aowl:entry [ a aowl:Entry;
aowl:id "urn:uuid:1225c695-cfb8-4ebb-aaaa-80da344efa6a"^^<http://www.w3.org/2001/XMLSchema#anyURI>;
aowl:link [ a aowl:Link;
aowl:rel iana:alternate;
aowl:to [ aowl:src some-blog:atom03]];
aowl:title "Atom-Powered Robots Run Amok";
aowl:updated "2003-12-13T18:30:02Z"^^<http://www.w3.org/2001/XMLSchema#dateTime>];
aowl:id "urn:uuid:60a76c80-d399-11d9-b93C-0003939e0af6"^^<http://www.w3.org/2001/XMLSchema#anyURI>;
aowl:link [ a aowl:Link;
aowl:rel iana:alternate;
aowl:to [ aowl:src <http://example.org/>]];
aowl:title "Example Feed";
aowl:updated "2003-12-13T18:30:02Z"^^<http://www.w3.org/2001/XMLSchema#dateTime>].Planet Atom's feed
@prefix : <http://bblfish.net/work/atom-owl/2006-06-06/#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix iana: <http://www.iana.org/assignments/relation/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
[] a :Feed ;
:id "http://planetatom.net/"^^xsd:anyURI;
:title "Planet Atom" ;
:updated "2006-12-10T06:57:54.166890Z"^^xsd:dateTime;
:generator [ a :Generator;
:uri <>;
:generatorVersion "";
:name """atomixlib"""];
:entry [ a :Entry;
:title "The Darfur Wall" ;
:author [ a :Person; :name "James Tauber"] ;
:link [ a :Link;
:rel iana:alternate ;
:to [ :src <http://jtauber.com/blog/2006/12/10/the_darfur_wall>;]
];
:updated "2006-12-10T00:13:34Z"^^xsd:dateTime;
:published "2006-12-10T00:13:34Z"^^xsd:dateTime;
:id "http://jtauber.com/blog/2006/12/10/the_darfur_wall"^^xsd:anyURI; ]via Copia