This document explains the concepts behind Web 3.0 and the semantic web through the analogy of a stamp collection. It discusses how standards like XML, RDF, OWL, and SWRL can add meaning to data by describing things like stamps, their attributes, and relationships. Microformats and SPARQL allow structured queries across decentralized data. Resource identifiers like URIs and XRIs help machines exchange information between databases. XDI supports data sharing and synchronization according to the standards.
3. Web 3.0 - the semantic
web - is about the
meaning of data.
4. This is a stamp
In 1980 you could buy this stamp for 1 cent
Now it’s worth 3 euros
This stamp is from the United Kingdom
This stamp is used between 1978 - 1981
The picture on the stamp is a PO Box
This stamp is designed by John Bryan Dunmore
14. This is my stamp collection
The first stamp is called “Red dragon”
and is from China. It was made in the
year: 1984.
The second stamp is called “PO Box”
and is from England. It was made in the
year: 1992.
< .. etc >
22. But, RDF scheme is limited. A
language needs more
expression and logic to make
good reasoning possible.
That’s why OWL (The Web
Ontology Language) was
invented.
32. hCard > contacts
hCalendar > events
hReview > reviews
hResume > resumes
XFN > social networks (relation= a friend or
colleague)
These things are described
with microformats.
36. Because the web is
decentralized and data is
in many places, not only
language is important.
Exchange of data between
different machines is key.
37. A database with stamps
A database with countries
A database with colors
A database with stamp traders
38. To make a connection a machine
needs a source. For this, we use
resource identifiers. Best known
resource identifier is the URI (which
consists of a name (urn) and a
location (url)).
39.
40. Because URI’s have
international limitations and
the need for data-exchange
between machines is rapidly
growing there is a successor:
XRI (Extensible Resource
Identifier)
41. There is a standard for sharing,
linking and synchronizing data.
This standard is called XDI (XRI
Data Interchange).
42. With all this I am
capable of using the
power of all different
data resources on the
web.