RDF::Redland::Storage(3pm)				User Contributed Perl Documentation				RDF::Redland::Storage(3pm)

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/

perl v5.14.2							    2011-02-04						RDF::Redland::Storage(3pm)