Python GraphPattern.addConstraint示例

示例#1

文件： Test11_3.py 项目： AuroraSkywalker/watchdog

        <rdf:Description>
                <foaf:name>Bob</foaf:name>
                <foaf:mbox>[email protected]</foaf:mbox>
        </rdf:Description>
</rdf:RDF>
"""


from testSPARQL import ns_rdf
from testSPARQL import ns_rdfs
from testSPARQL import ns_dc
from testSPARQL import ns_foaf
from testSPARQL import ns_ns
from testSPARQL import ns_book

from rdflib.Literal import Literal
from rdflib.sparql.graphPattern import GraphPattern

from rdflib.sparql.sparqlOperators import isURI


select = ["?name", "?mbox"]
pattern = GraphPattern([("?x", ns_foaf["name"], "?name"), ("?x", ns_foaf["mbox"], "?mbox")])
pattern.addConstraint(isURI("?mbox"))
optional = []
tripleStore = None
expected = """
  ?name: Alice
  ?mbox: mailto:[email protected]
"""

示例#2

文件： Test3_2.py 项目： ChunHungLiu/watchdog-1

>
        <rdf:Description rdf:ID="book1">
                <dc:title>SPARQL Tutorial</dc:title>
                <ns:price rdf:datatype="http://www.w3.org/2001/XMLSchema#integer">42</ns:price>
        </rdf:Description>
        <rdf:Description rdf:ID="book2">
                <dc:title>The Semantic Web</dc:title>
                <ns:price rdf:datatype="http://www.w3.org/2001/XMLSchema#integer">23</ns:price>
        </rdf:Description>
        <rdf:Description rdf:ID="book3">
                <dc:title>The Semantic Web Old</dc:title>
                <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#date">2000-03-12</dc:date>
        </rdf:Description>
        <rdf:Description rdf:ID="book4">
                <dc:title>The Semantic Web New</dc:title>
                <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#date">2005-03-02</dc:date>
        </rdf:Description>
</rdf:RDF>
"""

select = ["?title", "?price"]
pattern = GraphPattern([("?x", ns_dc["title"], "?title"),
                        ("?x", ns_ns["price"], "?price")])
pattern.addConstraint(lt("?price", 30))
optional = []
tripleStore = None
expected = '''
  ?title: The Semantic Web
  ?price: 23
'''

示例#3

文件： Test5_2.py 项目： AuroraSkywalker/watchdog

   xmlns:foaf="http://xmlns.com/foaf/0.1/"
   xmlns:ns = "http://example.org/ns#"
   xmlns:book = "http://example.org/book"
>
        <rdf:Description rdf:ID="book1">
                <dc:title>SPARQL Tutorial</dc:title>
                <ns:price rdf:datatype="http://www.w3.org/2001/XMLSchema#integer">42</ns:price>
        </rdf:Description>
        <rdf:Description rdf:ID="book2">
                <dc:title>The Semantic Web</dc:title>
                <ns:price rdf:datatype="http://www.w3.org/2001/XMLSchema#integer">23</ns:price>
        </rdf:Description>
</rdf:RDF>
"""

select      = ["?title", "?price"]
pattern     = GraphPattern([("?x", ns_dc["title"],"?title")])
optional    = GraphPattern([("?x",ns_ns["price"],"?price")])
optional.addConstraint(lt("?price",30))
tripleStore = None
expected = '''
  ?title: SPARQL Tutorial
  ?price: None

  ?title: The Semantic Web
  ?price: 23
'''

示例#4

文件： Test11_3.py 项目： ChunHungLiu/watchdog-1

        </rdf:Description>
        <rdf:Description>
                <foaf:name>Bob</foaf:name>
                <foaf:mbox>[email protected]</foaf:mbox>
        </rdf:Description>
</rdf:RDF>
"""

from testSPARQL import ns_rdf
from testSPARQL import ns_rdfs
from testSPARQL import ns_dc
from testSPARQL import ns_foaf
from testSPARQL import ns_ns
from testSPARQL import ns_book

from rdflib.Literal import Literal
from rdflib.sparql.graphPattern import GraphPattern

from rdflib.sparql.sparqlOperators import isURI

select = ["?name", "?mbox"]
pattern = GraphPattern([("?x", ns_foaf["name"], "?name"),
                        ("?x", ns_foaf["mbox"], "?mbox")])
pattern.addConstraint(isURI("?mbox"))
optional = []
tripleStore = None
expected = '''
  ?name: Alice
  ?mbox: mailto:[email protected]
'''

示例#5

文件： Test3_2.py 项目： AuroraSkywalker/watchdog

                <dc:title>SPARQL Tutorial</dc:title>
                <ns:price rdf:datatype="http://www.w3.org/2001/XMLSchema#integer">42</ns:price>
        </rdf:Description>
        <rdf:Description rdf:ID="book2">
                <dc:title>The Semantic Web</dc:title>
                <ns:price rdf:datatype="http://www.w3.org/2001/XMLSchema#integer">23</ns:price>
        </rdf:Description>
        <rdf:Description rdf:ID="book3">
                <dc:title>The Semantic Web Old</dc:title>
                <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#date">2000-03-12</dc:date>
        </rdf:Description>
        <rdf:Description rdf:ID="book4">
                <dc:title>The Semantic Web New</dc:title>
                <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#date">2005-03-02</dc:date>
        </rdf:Description>
</rdf:RDF>
"""

select      = ["?title", "?price"]
pattern     = GraphPattern([("?x", ns_dc["title"],"?title"),("?x",ns_ns["price"],"?price")])
pattern.addConstraint(lt("?price",30))
optional    = []
tripleStore = None
expected = '''
  ?title: The Semantic Web
  ?price: 23
'''

示例#6

   xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
   xmlns:dc="http://purl.org/dc/elements/1.1/"
   xmlns:foaf="http://xmlns.com/foaf/0.1/"
   xmlns:ns = "http://example.org/ns#"
   xmlns:book = "http://example.org/book"
>
        <rdf:Description rdf:ID="book1">
                <dc:title>SPARQL Tutorial</dc:title>
                <ns:price rdf:datatype="http://www.w3.org/2001/XMLSchema#integer">42</ns:price>
        </rdf:Description>
        <rdf:Description rdf:ID="book2">
                <dc:title>The Semantic Web</dc:title>
                <ns:price rdf:datatype="http://www.w3.org/2001/XMLSchema#integer">23</ns:price>
        </rdf:Description>
</rdf:RDF>
"""

select = ["?title", "?price"]
pattern = GraphPattern([("?x", ns_dc["title"], "?title")])
optional = GraphPattern([("?x", ns_ns["price"], "?price")])
optional.addConstraint(lt("?price", 30))
tripleStore = None
expected = '''
  ?title: SPARQL Tutorial
  ?price: None

  ?title: The Semantic Web
  ?price: 23
'''