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/

perl v5.38.2                                       2024-04-01                           RDF::Redland::Model(3pm)