NAME¶
RDF::Redland::Model - Redland RDF Model Class
SYNOPSIS¶
use RDF::Redland;
my $storage=new RDF::Redland::Storage("hashes", "test", "new='yes',hash-type='memory'");
my $model=new RDF::Redland::Model($storage, "");
...
my(@sources)=$model->targets($predicate_node, $object_node);
...
DESCRIPTION¶
Manipulate the RDF model.
CONSTRUCTORS¶
- new STORAGE OPTIONS_STRING
- new_with_options STORAGE OPTIONS_HASH
- Create a new RDF::Redland::Model object using
RDF::Redland::Storage object STORAGE with a options. The options
can be given either as a string in the first form as
OPTIONS_STRING. The options take the form
key1='value1',key2='value2'. The quotes are required. In the second case
OPTIONS_HASH is a reference to a Perl hash of options.
- new_from_model MODEL
- Create a new model from an existing RDF::Redland::Model
MODEL (copy constructor).
METHODS¶
- size
- Return the size of the model (number of statements).
- sync
- Synchronise the model to the underlying storage.
- add SUBJECT PREDICATE OBJECT
- Add a new statement to the model with SUBJECT,
PREDICATE and OBJECT. These can be RDF::Redland::Node,
RDF::Redland::URI or perl URI objects.
- add_typed_literal_statement SUBJECT PREDICATE STRING
[XML_LANGUAGE [DATATYPE]]
- Add a new statement to the model containing a typed literal
string object STRING with (optional) XML language (xml:lang
attribute) XML_LANGUAGE and (optional) datatype URI
DATATYPE. XML_LANGUAGE or DATATYPE can either or both
be set to undef.
- add_statement STATEMENT [CONTEXT] | NODE NODE NODE
[CONTEXT]
- Add RDF::Redland::Statement STATEMENT or the
statement formed by NODE NODE NODE to the model. If the optional
CONTEXT is given, associate it with that context. Any of
NODE or CONTEXT can be a RDF::Redland::Node,
RDF::Redland::URI or perl URI object.
- add_statements STREAM [CONTEXT]
- Add the statements from the RDF::Redland::Stream
STREAM to the model. If the optional CONTEXT is given,
associate it with that context. CONTEXT can be a
RDF::Redland::Node, RDF::Redland::URI or perl URI object.
- remove_statement STATEMENT [CONTEXT] | NODE NODE NODE
[CONTEXT]
- Remove RDF::Redland::Statement STATEMENT or the
statement formed by NODE NODE NODE from the model. If the optional
CONTEXT is given, remove only the statement stored with that
context. Any of NODE or CONTEXT can be a RDF::Redland::Node,
RDF::Redland::URI or perl URI object.
- remove_context_statements CONTEXT
- Remove all RDF::Redland::Statement STATEMENTs from
the model with the given CONTEXT context. CONTEXT can be a
RDF::Redland::Node, RDF::Redland::URI or perl URI object.
- contains_statement STATEMENT
- Return non 0 if the model contains RDF::Redland::Statement
STATEMENT.
- as_stream [CONTEXT]
- Return a new RDF::Redland::Stream object seralising the
entire model, or just those statements with CONTEXT, as
RDF::Redland::Statement objects. If given, CONTEXT can be a
RDF::Redland::Node, RDF::Redland::URI or perl URI object.
- find_statements STATEMENT [CONTEXT]
- Find all matching statements in the model matching partial
RDF::Redland::Statement STATEMENT (any of the subject, predicate,
object RDF::Redland::Node can be undef). If CONTEXT is given, finds
statements only in that context.
In an array context, returns an array of the matching
RDF::Redland::Statement objects. In a scalar context, returns the
RDF::Redland::Stream object representing the results.
- sources ARC TARGET
- Get all source RDF::Redland::Node objects for a given arc
ARC, target TARGET> RDF::Redland::Node objects as a list
of RDF::Redland::Node objects.
- arcs SOURCE TARGET
- Get all arc RDF::Redland::Node objects for a given source
SOURCE, target TARGET RDF::Redland::Node objects as a list
of RDF::Redland::Node objects.
- targets SOURCE ARC
- Get all target RDF::Redland::Node objects for a given
source SOURCE, arc ARC RDF::Redland::Node objects as a list
of RDF::Redland::Node objects.
- sources_iterator ARC TARGET
- Get all source RDF::Redland::Node objects for a given arc
ARC, target TARGET RDF::Redland::Node objects as an
RDF::Redland::Iterator or undef on failure.
- arcs_iterator SOURCE TARGET
- Get all arc RDF::Redland::Node objects for a given source
SOURCE, target TARGET RDF::Redland::Node objects as an
RDF::Redland::Iterator or undef on failure.
- targets_iterator SOURCE ARC
- Get all target RDF::Redland::Node objects for a given
source SOURCE, arc ARC RDF::Redland::Node objects as an
RDF::Redland::Iterator or undef on failure.
- source ARC TARGET
- Get one source RDF::Redland::Node object that matches a
given arc ARC, target TARGET RDF::Redland::Node objects or
undef if there is no match.
- arc SOURCE TARGET
- Get one arc RDF::Redland::Node object that matches a given
source SOURCE, target TARGET RDF::Redland::Node objects or
undef if there is no match.
- target SOURCE ARC
- Get one target RDF::Redland::Node object that matches a
given source SOURCE, arc ARC RDF::Redland::Node objects or
undef if there is no match.
- contexts
- Get all context RDF::Redland::Node objects in the
model
- feature URI [VALUE]
- Get/set a model feature. The feature is named via
RDF::Redland::URI URI and the value is a RDF::Redland::Node. If
VALUE is given, the feature is set to that value, otherwise the
current value is returned.
- query_execute QUERY
- Execute the QUERY RDF::Redland::Query against the
model returning a result set RDF::Redland::QueryResults or undef on
failure.
- load URI [SYNTAX-NAME [ MIME-TYPE [SYNTAX-URI [HANDLER
]]]
- Load content from URI into the model, guessing the
parser.
- to_string [BASE-URI [SYNTAX-NAME [ MIME-TYPE
[SYNTAX-URI]]]
- Serialize the model to a syntax. If no serializer name is
given, the default serializer RDF/XML is used.
OLDER METHODS¶
- serialise
- serialize
- Return a new RDF::Redland::Stream object seralising the
model as RDF::Redland::Statement objects. Replaced by as_stream to reduce
confusion with the RDF::Redland::Serializer class.
SEE ALSO¶
RDF::Redland::Storage, RDF::Redland::Node and RDF::Redland::Statement
AUTHOR¶
Dave Beckett -
http://www.dajobe.org/