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|
"""A pure Python package providing the core RDF constructs.
The packages is intended to provide the core RDF types and interfaces
for working with RDF. The package defines a plugin interface for
parsers, stores, and serializers that other packages can use to
implement parsers, stores, and serializers that will plug into the
rdflib package.
The primary interface `rdflib` exposes to work with RDF is
`rdflib.graph.Graph`.
A tiny example:
>>> from rdflib import Graph, URIRef, Literal
>>> g = Graph()
>>> result = g.parse("http://www.w3.org/2000/10/swap/test/meet/blue.rdf")
>>> print("graph has %s statements." % len(g))
graph has 4 statements.
>>>
>>> for s, p, o in g:
... if (s, p, o) not in g:
... raise Exception("It better be!")
>>> s = g.serialize(format='nt')
>>>
>>> sorted(g) == [
... (URIRef("http://meetings.example.com/cal#m1"),
... URIRef("http://www.example.org/meeting_organization#homePage"),
... URIRef("http://meetings.example.com/m1/hp")),
... (URIRef("http://www.example.org/people#fred"),
... URIRef("http://www.example.org/meeting_organization#attending"),
... URIRef("http://meetings.example.com/cal#m1")),
... (URIRef("http://www.example.org/people#fred"),
... URIRef("http://www.example.org/personal_details#GivenName"),
... Literal("Fred")),
... (URIRef("http://www.example.org/people#fred"),
... URIRef("http://www.example.org/personal_details#hasEmail"),
... URIRef("mailto:fred@example.com"))
... ]
True
"""
import logging
import sys
if sys.version_info < (3, 8):
# importlib is only available in Python 3.8+; for 3.7 we must do this:
import importlib_metadata as metadata
else:
from importlib import metadata
_DISTRIBUTION_METADATA = metadata.metadata("rdflib")
__docformat__ = "restructuredtext en"
__version__: str = _DISTRIBUTION_METADATA["Version"]
__date__ = "2023-03-26"
__all__ = [
"URIRef",
"BNode",
"IdentifiedNode",
"Literal",
"Variable",
"Namespace",
"Dataset",
"Graph",
"ConjunctiveGraph",
"BRICK",
"CSVW",
"DC",
"DCAT",
"DCMITYPE",
"DCTERMS",
"DOAP",
"FOAF",
"ODRL2",
"ORG",
"OWL",
"PROF",
"PROV",
"QB",
"RDF",
"RDFS",
"SDO",
"SH",
"SKOS",
"SOSA",
"SSN",
"TIME",
"VANN",
"VOID",
"XMLNS",
"XSD",
"util",
"plugin",
"query",
]
logger = logging.getLogger(__name__)
try:
import __main__
if (
not hasattr(__main__, "__file__")
and sys.stdout is not None
and hasattr(sys.stderr, "isatty")
and sys.stderr.isatty()
):
# show log messages in interactive mode
logger.setLevel(logging.INFO)
logger.addHandler(logging.StreamHandler())
del __main__
except ImportError:
# Main already imported from elsewhere
import warnings
warnings.warn("__main__ already imported", ImportWarning)
del warnings
del sys
NORMALIZE_LITERALS = True
"""
If True - Literals lexical forms are normalized when created.
I.e. the lexical forms is parsed according to data-type, then the
stored lexical form is the re-serialized value that was parsed.
Illegal values for a datatype are simply kept. The normalized keyword
for Literal.__new__ can override this.
For example:
>>> from rdflib import Literal,XSD
>>> Literal("01", datatype=XSD.int)
rdflib.term.Literal("1", datatype=rdflib.term.URIRef("http://www.w3.org/2001/XMLSchema#integer"))
This flag may be changed at any time, but will only affect literals
created after that time, previously created literals will remain
(un)normalized.
"""
DAWG_LITERAL_COLLATION = False
"""
DAWG_LITERAL_COLLATION determines how literals are ordered or compared
to each other.
In SPARQL, applying the >,<,>=,<= operators to literals of
incompatible data-types is an error, i.e:
Literal(2)>Literal('cake') is neither true nor false, but an error.
This is a problem in PY3, where lists of Literals of incompatible
types can no longer be sorted.
Setting this flag to True gives you strict DAWG/SPARQL compliance,
setting it to False will order Literals with incompatible datatypes by
datatype URI
In particular, this determines how the rich comparison operators for
Literal work, eq, __neq__, __lt__, etc.
"""
from rdflib.graph import ConjunctiveGraph, Dataset, Graph
from rdflib.namespace import (
BRICK,
CSVW,
DC,
DCAT,
DCMITYPE,
DCTERMS,
DOAP,
FOAF,
ODRL2,
ORG,
OWL,
PROF,
PROV,
QB,
RDF,
RDFS,
SDO,
SH,
SKOS,
SOSA,
SSN,
TIME,
VANN,
VOID,
XMLNS,
XSD,
Namespace,
)
from rdflib.term import BNode, IdentifiedNode, Literal, URIRef, Variable
from rdflib import plugin, query, util # isort:skip
from rdflib.container import * # isort:skip # noqa:F401,F403
|
