Virtuoso 给出错误结果，涉及重定向

Question

PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
PREFIX dbpedia_property: <http://dbpedia.org/property/>
PREFIX dbpedia_ontology: <http://dbpedia.org/ontology/>
PREFIX yago: <http://dbpedia.org/class/yago/>
PREFIX schema: <http://schema.org/>

SELECT * WHERE
{
  {
      SELECT ?school, ?name, ?snippet, ?url, ?pageid, ?alias_1, ?alias_2, ?alias_3
      WHERE
      {
        { ?school rdf:type   schema:EducationalOrganization . }
        UNION
        { ?school rdf:type   yago:EducationalInstitution108276342 . }

        ?school rdfs:label ?name .

        OPTIONAL {
          ?school foaf:isPrimaryTopicOf ?url .
        }

        OPTIONAL {
          ?school dbpedia_ontology:wikiPageID ?pageid .
        }

        OPTIONAL {
          ?school rdfs:comment ?snippet .
          FILTER (langMatches(lang(?snippet),"en"))
        }

        OPTIONAL {
          ?school dbpedia_property:name ?alias_1 .
          FILTER ( langMatches(lang(?alias_1),"en") )
        }

        OPTIONAL {
          ?school foaf:name ?alias_2 .
          FILTER ( langMatches(lang(?alias_2),"en") )
        }

        OPTIONAL {
          ?school dbpedia_ontology:wikiPageRedirects ?temp .
          ?temp rdfs:label ?alias_3 .
          FILTER ( langMatches(lang(?alias_3),"en") )
        }

        OPTIONAL {
          ?school rdf:type ?excluded .
          FILTER (?excluded = schema:Library)
        }

        FILTER ( langMatches(lang(?name),"en") && !BOUND(?excluded) )
    }
    ORDER BY ?name
  }
}
LIMIT 1
OFFSET 0

可以看到结果给出了资源

http://dbpedia.org/resource/"Wesleyan_Methodist_College"

这将被重定向到

http://dbpedia.org/page/Southern_Wesleyan_University

为什么Virtuoso不解析资源并给出最终目的地？有没有办法指示它忽略重定向？

Answer 1

关于资源的/resource/和/page/是不同的东西。例如，一个的长度以字节为单位。

网页不是 schema:EducationalOrganization。

如果您使用 HTTP /resource/ 查找，DBpedia 会发回一个 HTTP 303，然后浏览器会跟进。这是您浏览器的选择。

查看输出：

wget --max-redirect 0 -O/dev/null -S http://dbpedia.org/resource/Wesleyan_Methodist_College

或

curl -v --max-redirs 0 http://dbpedia.org/resource/Wesleyan_Methodist_College

Virtuoso 给出错误结果，涉及重定向

Virtuoso giving wrong result, redirect involved

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