用于RDF存储和检索的Python + Redland示例

from rdflib import Graph, Literal, Namespace, RDF, URIRef
from rdflib.namespace import FOAF, XSD

g = Graph()

# 创建命名空间
ns = Namespace("http://example.org/")

# 添加三元组
g.add((ns.John, RDF.type, FOAF.Person))
g.add((ns.John, FOAF.name, Literal("John Smith")))
g.add((ns.John, FOAF.age, Literal(30, datatype=XSD.integer)))

g.serialize("rdf_data.rdf", format="xml")

# 执行SPARQL查询
query = """
    PREFIX foaf: <http://xmlns.com/foaf/0.1/>
    SELECT ?name ?age
    WHERE {
        ?person foaf:name ?name ;
                foaf:age ?age .
    }
"""

results = g.query(query)

# 遍历查询结果
for row in results:
    name = row.name
    age = row.age
    print(f"Name: {name}, Age: {age}")