我正在尝试以Turtle格式对一些植物数据进行编码,并使用RDFLib从Python中读取这些数据。然而,我遇到了问题,我不确定是因为我的Turtle格式有误还是我错误地使用了RDFLib。
我的测试数据如下:
@PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@PREFIX p: <http://www.myplantdomain.com/plant/description> .
p:description a rdfs:Property .
p:name a rdfs:Property .
p:language a rdfs:Property .
p:value a rdfs:Property .
p:gender a rdfs:Property .
p:inforescence a rdfs:Property .
p:color a rdfs:Property .
p:sense a rdfs:Property .
p:type a rdfs:Property .
p:fruit a rdfs:Property .
p:flower a rdfs:Property .
p:dataSource a rdfs:Property .
p:degree a rdfs:Property .
p:date a rdfs:Property .
p:person a rdfs:Property .
p:c2a7b9a3-c54a-41f5-a3b2-155351b3590f
p:description [
p:name [
p:kingdom "Plantae" ;
p:division "Pinophyta" ;
p:class "Pinopsida" ;
p:order "Pinales" ;
p:family "Pinaceae" ;
p:genus "Abies" ;
p:species "A. alba" ;
p:language "latin" ;
p:given_by [
p:person p:source/Philip_Miller ;
p:start_date "1923-1-2"^^<http://www.w3.org/2001/XMLSchema#date>
]
] ;
p:name [
p:language "english" ;
p:value "silver fir"
] ;
p:flower [
p:gender "male"@en ;
p:inflorescence "catkin"@en ;
p:color "brown"@en ;
p:color "yellow"@en ;
p:sense "straight"@en
] ;
p:flower [
p:gender "female"@en ;
p:inflorescence "catkin"@en ;
p:color "pink"@en ;
p:color "yellow"@en ;
p:sense "straight"@en
] ;
p:fruit [
p:type "cone"@en ;
p:color "brown"@en
]
] .
我的Python是:
import rdflib
g = rdflib.Graph()
#result = g.parse('trees.ttl')
#result = g.parse('trees.ttl', format='ttl')
result = g.parse('trees.ttl', format='n3')
print len(g)
for stmt in g:
print stmt
这给了我错误:
ValueError: Found @PREFIX when expecting a http://www.w3.org/2000/10/swap/grammar/n3#document . todoStack=[['http://www.w3.org/2000/10/swap/grammar/n3#document', []]]
我尝试过更改parse()参数,但是每次都会出错。我几乎找不到有关如何解析Turtle的示例。我做错了什么?