NAME

       RDF::Redland::Storage - Redland RDF Storage Class

SYNOPSIS

         use RDF::Redland;
         my $storage=new RDF::Redland::Storage("hashes", "test", "new='yes',hash-type='memory'");
         ...

DESCRIPTION

       Create objects for storing RDF::Redland::Model objects either persistently or in memory.

CONSTRUCTORS

       new STORAGE_NAME [NAME [OPTIONS_STRING]]
           Create a new RDF::Redland::Storage object for the storage factory named STORAGE_NAME
           with storage named NAME and storage options OPTIONS_STRING which are specific to the
           storage factory type.

           The storage options may be given either as a Perl hash or as a string. The string form
           are formatted in the form key1='value1',key2='value2' and the single quotes are
           required. The Perl hash form follows normal Perl conventions, and the boolean options
           use normal Perl concepts of truth.

           Currently defined storage options:

           new='yes'
               Create a new storage erasing any existing one (boolean, default).

           write='yes'
               Provide write access to store (boolean, default) otherwise is read only.

           dir='DIR'
               Work in DIR directory when creating files.

           mode='MODE'
               File creation mode, default is (octal) 0644 Takes decimal (123), hex (0x123) or
               octal (0123).

           contexts='yes'
               Enable statement contexts.  Each statement can be stored with an optional context
               Node and the context retrieved after queries. Boolean.

           hash-type='TYPE' (hashes storage only)
               Use the TYPE hash-type for hashes storage.  Current defined types are 'memory' and
               'bdb' but is dependent on the hash factories available.

           index-predicates='yes' (hashes storage only)
               Enable indexing from predicates to (subject,object) which can in particular be
               useful for rdf:type relations. Boolean.

           bulk='no' (mysql storage only)
               Whether model/storage method add_statements should be optimized, until a
               model/storage sync operation. Boolean.

           merge='no' (mysql storage only)
               Whether to maintain a table with merged models. Boolean.

           Example, string form:

             $storage=new RDF::Redland::Storage("hashes", "test",
                                       "new='yes',hash-type='bdb',dir='.'");

           Example, Perl hash form:

             $storage=new RDF::Redland::Storage("hashes", "test",
                                       {new=>1,hash-type=>'bdb',dir=>'.'});

           Creates a new storage of the hashes type (indexed hashes) named test (these will be
           file names or URIs if the storage is persistent) and with options
           new='yes',hash-type='bdb',dir='.' so a new storage is created with BerkeleyDB (BDB)
           key:value hashes i.e. persistent and in the current directory.

           Example, Perl hash form:

             $storage=new RDF::Redland::Storage("mysql", "test", {host=>'localhost',database=>'testdb',user=>'testuser',new=>0,password=>'',contexts=>1});

           Uses an existing storage of the mysql type, named test on localhost with database name
           testdb using a user testuser and no password. Contexts are enabled.

       new_from_storage STORAGE
           Create a new RDF::Redland::Storage object from RDF::Redland::Storage STORAGE (copy
           constructor).  The new storage may have a new name chosen by the storage factory.

SEE ALSO

       RDF::Redland::Model

AUTHOR

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