Python 如何在RDFLib中向图形添加注释或标签？

我正在尝试将数据集的名称添加到graph对象中，然后检索它们，非常确定一定有简单的方法来完成它，但到目前为止找不到任何内容。。。谢谢

我认为您需要的是将上下文附加到图形上。这就像在解析其中的子图时创建一个图，对于rdflib，每个子图都有一个名称-a

URIRef

假设您必须使用以下两个文件表示的图形：

dataA.nt

<http://data.org/inst1> <http://xmlns.com/foaf/0.1/name> "david" .
<http://data.org/inst2> <http://xmlns.com/foaf/0.1/name> "luis" .
<http://data.org/inst3> <http://xmlns.com/foaf/0.1/name> "max" .

<http://data.org/inst1> <http://xmlns.com/foaf/0.1/knows> <http://data.org/inst2> .
<http://data.org/inst2> <http://xmlns.com/foaf/0.1/knows> <http://data.org/inst3> .
<http://data.org/inst3> <http://xmlns.com/foaf/0.1/knows> <http://data.org/inst1> .

import rdflib

g = rdflib.ConjunctiveGraph("IOMemory",)

#g is made of two sub-graphs or triples gathered in two different contexts.
#the second paramaters identifies the URIRef for each subgraph.
g.parse("dataA.nt",rdflib.URIRef("http://mygraphs.org/names"),format="n3")
g.parse("dataB.nt",rdflib.URIRef("http://mygraphs.org/relations"),format="n3")

print "traverse all contexts and all triples for each context"
for subgraph in g.contexts():
    print "Graph name",subgraph.identifier 
    for triple in subgraph.triples((None,None,None)):
        print triple

print "traverse all contexts where a triple appears"
for subgraph in g.contexts(triple=(rdflib.URIRef('http://data.org/inst1'),rdflib.URIRef("http://xmlns.com/foaf/0.1/name"),rdflib.Literal(u'david'))):
    print "Graph name",subgraph.identifier 
    for triple in subgraph.triples((None,None,None)):
        print triple

print "traverse a triple pattern regardless the context is in"
for t in g.triples((None,rdflib.URIRef("http://xmlns.com/foaf/0.1/name"),None)):
    print t