I would recommend reading the book "The Explorer's Guide to the Semantic Web".
<https://www.amazon.com/Explorers-Guide-Semantic-Thomas-Passin/dp/1932394206> Phil This message optimized for indexing by NSA PRISM On Wed, Jun 7, 2017 at 8:52 AM, tina sani <[email protected]> wrote: > Thank you Colin and David for your detailed answer. > > On Wed, Jun 7, 2017 at 3:28 PM, Colin Maudry <[email protected]> wrote: > >> Hello Tina, >> >> Thank you very much for your interest for the Semantic Web. This mailling >> list is specifically dedicated to a tool, Apache Jena. It's like asking >> about astronomy on a list dedicated to a brand of telescopes : it's >> off-topic. >> >> The Wikipedia article about the Semantic Web is a very good start : >> https://en.wikipedia.org/wiki/Semantic_Web >> >> If you're fond off asking humans, I suggest you ask your question to the >> following list, you will certainly get more answers : >> http://lists.w3.org/Archives/Public/semantic-web/ >> >> Have a nice trip on the paths of the Web of data :) >> >> Colin >> >> -------- Original Message -------- >> Subject: Re: Web 3 vs Web 2 >> Local Time: June 7, 2017 1:25 PM >> UTC Time: June 7, 2017 11:25 AM >> From: [email protected] >> To: [email protected] >> >> To see the metadata you have to consider the prefix statements that must >> be made before you can use the triples in your example/ >> >> @prefix rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns# >> >> click on the hyperlink to follow it. >> >> Using this prefix statement adds metadata essential to understanding the >> triple: >> Student rdf:type Person >> >> rdf:type means: >> rdf:type a rdf:Property ; >> rdfs:isDefinedBy <http://www.w3.org/1999/02/22-rdf-syntax-ns#> ; >> rdfs:label "type" ; >> rdfs:comment "The subject is an instance of a class." ; >> rdfs:range rdfs:Class ; >> rdfs:domain rdfs:Resource . >> >> The object “Person” in the triple may also have metadata associated with >> it. >> If the prefix: >> >> @prefix foaf: http://xmlns.com/foaf/0.1/ >> >> is used the metadata associated with foaf:Person is >> >> <rdfs:Class rdf:about="http://xmlns.com/foaf/0.1/Person"; >> rdfs:label="Person" rdfs:comment="A person." >> vs:term_status="stable"><rdf:type >> rdf:resource="http://www.w3.org/2002/07/owl#Class"/><owl:equivalentClass >> rdf:resource="http://schema.org/Person"/><owl:equivalentClass >> rdf:resource="http://www.w3.org/2000/10/swap/pim/contact#Person"/><!-- >> <rdfs:subClassOf><owl:Class rdf:about="http://xmlns.com/wordnet/1.6/Person >> "/></rdfs:subClassOf> >> --><rdfs:subClassOf><owl:Class rdf:about="http://xmlns.com/foaf/0.1/Agent >> "/></rdfs:subClassOf><!-- <rdfs:subClassOf><owl:Class rdf:about=" >> http://xmlns.com/wordnet/1.6/Agent"/></rdfs:subClassOf> >> --><rdfs:subClassOf><owl:Class rdf:about="http://www.w3.org/ >> 2003/01/geo/wgs84_pos#SpatialThing" rdfs:label="Spatial >> Thing"/></rdfs:subClassOf><!-- aside: >> are spatial things always spatially located? >> Person includes imaginary people... discuss... >> --><rdfs:isDefinedBy rdf:resource="http://xmlns.com/foaf/0.1/"/><!-- >> <owl:disjointWith rdf:resource="http://xmlns.com/foaf/0.1/Document"/> >> this was a mistake; tattoo'd people, for example. >> --><owl:disjointWith rdf:resource="http://xmlns.com/foaf/0.1/Organization >> "/><owl:disjointWith rdf:resource="http://xmlns.com/foaf/0.1/Project >> "/></rdfs:Class> >> >> So you can see even a simple statement like >> >> Student rdf:type foaf:Person >> >> contains a huge amount of metadata that can be located and used by a >> machine! >> >> On 7/6/17, 1:07 am, "tina sani" <[email protected]> wrote: >> >> For example, there is an rdf document about a student. >> >> Student rdf:type Person. Student hasName name. Student hasAdress adress >> >> Student study Course. >> >> Where is the meta data here. How machines understand this data. >>
