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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 v5.34.0 2022-02-07 RDF::Redland::Storage(3pm)
Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
On Apache
Under GNU General Public License
2024-12-12 17:05 @3.142.194.124 CrawledBy Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)