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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 | .. _upgrade2to3: Upgrading from RDFLib version 2.X to 3.X
========================================
Upgrading from RDFLib version 2.X to 3.X
========================================
Introduction
============
This page details the changes required to upgrade from RDFLib 2.X to 3.X.
Some older Linux distributions still ship 2.4.X. If needed, you can also install 2.4 using easy_install/setup tools.
Version 3.0 reorganised some packages, and moved non-core parts of rdflib to the `rdfextras project <http://code.google.com/p/rdfextras/>`_
Features moved to rdfextras
===========================
* SPARQL Support is now in rdfextras / rdflib-sparql
* The RDF Commandline tools are now in rdfextras
.. warning:: If you install packages with just distutils - you will need to register the sparql plugins manually - we strongly recommend installing with setuptools or distribute!
To register the plugins add this somewhere in your program:
.. code-block:: python
rdflib.plugin.register('sparql', rdflib.query.Processor,
'rdfextras.sparql.processor', 'Processor')
rdflib.plugin.register('sparql', rdflib.query.Result,
'rdfextras.sparql.query', 'SPARQLQueryResult')
Unstable features that were removed
===================================
The RDBMS back stores (MySQL/PostgreSQL) were removed, but are in the process of being moved to rdfextras. The Redland, SQLite and ZODB stores were all removed.
Packages/Classes that were renamed
==================================
Previously all packages and classes had colliding names, i.e. both package and the class was called "Graph"::
from rdflib.Graph import Graph, ConjunctiveGraph
Now all packages are lower-case, i.e::
from rdflib.graph import Graph, ConjunctiveGraph
Most classes you need are available from the top level rdflib package::
from rdflib import Graph, URIRef, BNode, Literal
Namespace classes for RDF, RDFS, OWL are now directly in the rdflib package, i.e. in 2.4::
from rdflib.RDF import RDFNS as RDF
in 3.0::
from rdflib import RDF
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