3. Linked Data: how it works - quiz

Graph coalescence is the principle that:

RDF is a knowledge representation language and not just a data representation language because:

The nodes and arcs in an RDF graph refer to resources in the world
RDF graphs carry semantics
It represents statements about the world as well as statements explaining what these statements about the world mean
RDF graphs consist of statements that, in turn, consist of a subject, a predicate and an object

Which of the following statements about RDF are true (multiple options):

Facts are expressed as triples
The graph is the core structure of RDF
A triple is a statement consisting of a subject, a predicate, and one or more objects
Literals denote literal values, which are not resources

Which of the following statements about URIs are true (multiple options):

Every resource has at most one unique URI referring to it
The party that owns the domain name in a URI is responsible for determining what the URI refers to
A URI must be dereferenceable so that it returns useful information
W3C is the central authority that ensures that URIs are globally unique
Minting a URI is stating an authoritative definition of that URI in terms of what it refers to

A URI is said to be a persistent URI if, and only if:

The foundational ontologies of Linked Data include:

Which of the following statements are true (multiple options):

In many situations, it suffices to use just RDF to express data in a dataset for maximal simplicity
RDFS introduces the notions of individual, class and class hierarchy
OWL can be used for data validation
SHACL supports expressing rules and constraints for purposes such as data validation
SHACL and OWL cannot be used together in one dataset or one ontology
The more two datasets use common ontologies, the easier it is to combine them

The five pillars of interoperable data are:

Globally unique identifiers, graph representation, ability to make statements, ontology embedded in data, standards
Formalized semantics, globally unique identifiers, graph representation, ontology embedded in data, standards
Globally unique identifiers, graph representation, ability to make statements, foundational ontologies, standards
Data-centricity, globally unique identifiers, graph representation, ontology embedded in data, standards
Globally unique identifiers, graph representation, ontology embedded in data, standards, rich metadata

3. Linked Data: how it works – quiz