Ubuntu Manpage: RDF::Redland::Model - Redland RDF Model Class

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Provided by: librdf-perl_1.0.17.1+dfsg-6build5_amd64

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.

AUTHOR

       Dave Beckett - http://www.dajobe.org/