我很难找到一个明确,明智的rdflib使用上下文的例子.
ConjunctiveGraph不接受上下文,并且不推荐使用Graph.我应该如何在同一个全局ConjunctiveGraph中的不同上下文中创建和操作？
ConjunctiveGraph不接受上下文,并且不推荐使用Graph.我应该如何在同一个全局ConjunctiveGraph中的不同上下文中创建和操作？
解决方法
是.这是代码
import rdflib
from rdflib.Graph import Graph
conj=rdflib.ConjunctiveGraph()
NS=rdflib.Namespace("http://example.com/#")
NS_CTX=rdflib.Namespace("http://example.com/context/#")
alice=NS.alice
bob=NS.bob
charlie=NS.charlie
pizza=NS.pizza
meat=NS.meat
chocolate=NS.chocolate
loves=NS.loves
hates=NS.hates
likes=NS.likes
dislikes=NS.dislikes
love_ctx=Graph(conj.store,NS_CTX.love)
food_ctx=Graph(conj.store,NS_CTX.food)
love_ctx.add( (alice,loves,bob) )
love_ctx.add( (alice,charlie) )
love_ctx.add( (bob,hates,charlie) )
love_ctx.add( (charlie,bob) )
food_ctx.add( (alice,likes,chocolate) )
food_ctx.add( (alice,meat) )
food_ctx.add( (alice,dislikes,pizza) )
print "Full context"
for t in conj:
print t
print ""
print "Contexts"
for c in conj.contexts():
print c
print "love context"
for t in love_ctx:
print t
print "food context"
for t in food_ctx:
print t
这是输出
Full context
(rdflib.URIRef('http://example.com/#bob'),rdflib.URIRef('http://example.com/#hates'),rdflib.URIRef('http://example.com/#charlie'))
(rdflib.URIRef('http://example.com/#alice'),rdflib.URIRef('http://example.com/#likes'),rdflib.URIRef('http://example.com/#chocolate'))
(rdflib.URIRef('http://example.com/#alice'),rdflib.URIRef('http://example.com/#meat'))
(rdflib.URIRef('http://example.com/#alice'),rdflib.URIRef('http://example.com/#dislikes'),rdflib.URIRef('http://example.com/#pizza'))
(rdflib.URIRef('http://example.com/#alice'),rdflib.URIRef('http://example.com/#loves'),rdflib.URIRef('http://example.com/#bob'))
(rdflib.URIRef('http://example.com/#alice'),rdflib.URIRef('http://example.com/#charlie'))
(rdflib.URIRef('http://example.com/#charlie'),rdflib.URIRef('http://example.com/#bob'))
Contexts
<http://example.com/context/#food> a rdfg:Graph;rdflib:storage [a rdflib:Store;rdfs:label 'IOMemory'].
<http://example.com/context/#love> a rdfg:Graph;rdflib:storage [a rdflib:Store;rdfs:label 'IOMemory'].
love context
(rdflib.URIRef('http://example.com/#bob'),rdflib.URIRef('http://example.com/#bob'))
food context
(rdflib.URIRef('http://example.com/#alice'),rdflib.URIRef('http://example.com/#pizza'))