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Field Summary
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionstatic String
static String
getMetadata
(String key, String defaultValue) Deprecated.To be removedstatic String
getSystemProperty
(String propName) static String
getSystemProperty
(String propName, String defaultValue) static void
setFeature
(String featureName) Deprecated.To be removed
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Field Details
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isRDF11
public static boolean isRDF11The global
isRDF11
exists only to support development in Jena2. It is not expected that this flag will be "true" for Jena2 releases.Jena2 provides RDF 1.0 (AKA RDF 2004) and as much of RDF 1.1 that can be provided without invalidating existing data and applications. For example, the Turtle family parsers cover the RDF 1.1 defined grammars.
RDF 1.1 does make some changes that will effect some applications. The RDF Working Group do not expect these to be that major but they are visible in some situations.
One of these changes is that literals always have a datatype. RDF 1.0 plain literals (e.g.
"foo"
and"foo"@en
) do not have datatype.In RDF 1.1:
- string literals without language tag have datatype
xsd:string
- string literals with language tag have datatype
rdf:langString
. They still have a language tag.
In RDF 1.0,
"foo"
and"foo"^^xsd:string
are different RDF terms. Triples:s :p "foo"
and:s :p "foo"^^xsd:string
are two different RDF triples. Jena memory models provide "same value" semantics, so these can both be found looking for object of"foo"
but two such triples are found.Other storage implementations do not provide these "same value" semantics. Two triples are stored in a graph or in a database.
In RDF 1.1,
"foo"
and"foo"^^xsd:string
are the same RDF term; it is just two different ways to write it. The example triples above are the same triple. Only one triple would be stored in a graph or on disk.It is common for applications to work either with RDF 1.0 untyped strings or with typed
xsd:strings
. Mixed working is less common. Mixed working applications will be affected by the changes in RDF 1.1.Default full RDF 1.1 behaviour is expected in Jena3, with the change of major version number used to indicate the application-visible change.
- string literals without language tag have datatype
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featureNoSecurity
Deprecated.To be removed- See Also:
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featureNoCharset
Deprecated.To be removed- See Also:
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Constructor Details
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JenaRuntime
public JenaRuntime()
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Method Details
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getMetadata
Deprecated.To be removed -
setFeature
Deprecated.To be removed -
getLineSeparator
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getSystemProperty
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getSystemProperty
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