鉴于此 RDF:
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE rdf:RDF [<!ENTITY rdf 'http://www.w3.org/1999/02/22-rdf-syntax-ns#'>
<!ENTITY rdfs 'http://www.w3.org/2000/01/rdf-schema#'>
<!ENTITY xsd 'http://www.w3.org/2001/XMLSchema#'>]>
<rdf:RDF xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:dnr="http://www.dotnetrdf.org/configuration#"
xml:base="http://www.example.org/">
<rdf:Description rdf:about="Fadi">
<ns:be xmlns:ns="http://example.org/">Nice</ns:be>
</rdf:Description>
<rdf:Description rdf:about="Fadi">
<ns:not xmlns:ns="http://example.org/" xml:startTime="00:00:13" xml:endTime="00:00:16">Good</ns:not>
</rdf:Description>
<rdf:Description rdf:about="She">
<ns:be xmlns:ns="http://example.org/" xml:startTime="00:00:13" xml:endTime="00:00:16">Good</ns:be>
</rdf:Description>
</rdf:RDF>
如何使用 sparql 查询请求获取属性:startTime 和 endTime?!