Resource Description Framework (RDF and RDFS) in XML
The Resource Description Framework is the cornerstone of
the W3C's Semantic Web Activity.
The first pattern specifies all the names for elements in
the RDF and RDFS namespaces. The second pattern validates some
attribute names. The third pattern specifies elements which are
obsolescent, according to the proposed syntax. The fourth pattern
finds some common spelling errors.
The fifth pattern specifies the information items of RDF which
can be elements, including descriptions and properties. The remaining
patterns allow better validation of some attributes.
This schema will validate RDF elements and attributes according
to the RDF/XML syntax of
http://www.w3.org/TR/2003/WD-rdf-syntax-grammar-20030123
It passes all RDF files in the RDF test suite and reports all errors
in that test suite (except for certain ones regarding banning
local attributes in foreign namespaces, which needs further
clarification.) @@ To be verified
The schema can also be used to label the function of elements
with respect to the RDF framework.
Invoking a validator using the "simple" phase basic tests
only. Invoking all the patterns will also report common spelling
errors and obselescent elements.
The RDF namespace has the following names for elements: RDF,
Description, subject, predicate, object, type, value,
property, Bag, Seq, Alt, li or a name made from a prefix '_'
followed by a number.
All attributes
on elements in the RDF namespace should be prefixed.
The RDFS namespace has the following names for elements:
Class, label, comment, range, domain, subPropertyOf,
subClassOf, seeAlso, isDefinedBy, constraintResource,
constraintProperty, resource.
rdf:li is not allowed as an attribute.
The element is not part of the refactored RDF syntax.
This
schema may not handle all parts of the abbreviated syntax,
such as elements.
A
element should be in the RDF Namespace.
The element
is not the correct capitalization. XML is case-sensitive.
The element
is not the correct capitalization. XML is case-sensitive.
The rdf:RDF element can
only appear at the top-level
An rdf:* attribute cannot go on rdf:RDF.
Any rdf elements or
attributes inside a parseOther section are not significant to
the RDF document as rdf markup.
A Description element can appear at the
top-level, as the child of rdf:RDF, or be the child of a
property element with no parseType. If an element has
rdf:parseType or rdf:resource, it is not a description
element or typed node.
A typed node element can appear at the
top-level, as the child of rdf:RDF, or be the child of a
property element with no parseType. If an element has
rdf:parseType or rdf:resource, it is not a description
element or typed node.
Property elements such as
should appear as the child of a description element or the
child of an element with parseType of "Resource"
Property elements such as
should not have any bagIDs.
Property elements
such as should not have an rdf:about or an rdf:aboutEach
attribute.
An element in the RDF namespace such as
should be RDF, Description, or be used as a property element
or description element or typed node.
The element
was not expected by the schema.
The
rdf:ID attribute should have unique token values in a document.
The rdf:bagID attribute should have unique token values in a
document.
The parseType attribute in a
should be spelled either 'Literal' or 'Resource'.
If the
parseType attribute is 'Literal', the
element should not contain child elements.
Specifying an rdf:parseType of "Literal" and an rdf:resource
attribute at the same time is an error
If the parseType is 'Literal', there should be no other
attributes outside the rdf namespace on the element.
The element can only have one rdf:ID or an rdf:about or an
rdf:aboutEach attribute.
The rdf:RDF element should not have an
attributes.
The element should use only the abbreviated syntax or the full
syntax but not both.
Add
xmlns="http://www.w3.org/1999/02/22-rdf-syntax-ns#" to
the element.
Check the spelling and
capitalization