GraphDB的可视图不会显示所有三元组 [英] GraphDB's Visual graph does not display all triples

问题描述

在我的图中，我有以下断言

In my graph I have the following assertions

  @prefix :     <http://www.example.org/~joe/contact.rdf#> .
  @prefix foaf: <http://xmlns.com/foaf/0.1/> .
  @prefix rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .

  :joesmith a foaf:Person ;
        foaf:givenname "Joe" ;
        foaf:family_name "Smith" ;
        foaf:homepage <http://www.example.org/~joe/> ;
        foaf:mbox <mailto:[e-mail]> .

我将图形加载到GraphDB中.

I loaded the graph in GraphDB.

如果我将GraphDB的可视图指向:joesmith，我想查看所有三元组，但是我看到了此图

If I point the GraphDB's Visual Graph to :joesmith, I would like to see all the triples but I see this graph

foaf:givenname和foaf:family_name没有显示在图中，但是它们在节点详细信息选项卡中，没关系.

foaf:givenname and foaf:family_name are not shown in the graph but they are in node details tab, and it's ok.

相反，节点http://www.example.org/~joe/未连接到:joesmith.似乎很有线，因为有一个明确的断言属于:joesmith

Instead the node http://www.example.org/~joe/ is not connected to :joesmith. It seems pretty wired, since there is an explicit assertion belonging to :joesmith

这是我的数据中的错误还是问题?

Is this a bug or a problem in my data?

推荐答案

这绝对是一个错误.此错误仅影响Visual Graph功能.在SPARQL结果视图中，一切都很好.

This is definitely a bug. This bug affects Visual Graph functionality only. In the SPARQL results view, everything is fine.

问题似乎很复杂.有两个因素:

The problem seems to be complex. There are two factors:

• 此命名空间- <http://xmlns.com/foaf/0.1/> —硬编码在某个地方.

• This namespace — <http://xmlns.com/foaf/0.1/> — is hardcoded somewhere.

此命名空间处理不正确.

This namespace is not proceeded correctly.

让我们考虑以下示例.
在每个示例之前，请清除您的存储库并删除在 Setup>命名空间中创建的前缀.

Let us consider the following examples.
Before each example, clear your repository and delete prefixes created in Setup > Namespaces.

案例1

@prefix :     <http://www.example.org/~joe/contact.rdf#> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .

  :joesmith a foaf:Person ;
        foaf:givenname "Joe" ;
        foaf:family_name "Smith" ;
        foaf:homepage <http://www.example.org/~joe/> ;
        foaf:mbox <mailto:[e-mail]> .

如您所指出的，<http://www.example.org/~joe/> 未显示.

案例2

@prefix :     <http://www.example.org/~joe/contact.rdf#> .
@prefix foo: <http://xmlns.com/foaf/0.1/> .
@prefix rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .

  :joesmith a foo:Person ;
        foo:givenname "Joe" ;
        foo:family_name "Smith" ;
        foo:homepage <http://www.example.org/~joe/> ;
        foo:mbox <mailto:[e-mail]> .

在这种情况下，未显示<http://www.example.org/~joe/> .

In this case, <http://www.example.org/~joe/> is not shown.

案例3

@prefix :     <http://www.example.org/~joe/contact.rdf#> .
@prefix foaf: <http://xmlns.com/foaf/01/> .
@prefix rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .

  :joesmith a foaf:Person ;
        foaf:givenname "Joe" ;
        foaf:family_name "Smith" ;
        foaf:homepage <http://www.example.org/~joe/> ;
        foaf:mbox <mailto:[e-mail]> .

在这种情况下，显示<http://www.example.org/~joe/> .

In this case, <http://www.example.org/~joe/> is shown.

案例4

@prefix :     <http://www.example.org/~joe/contact.rdf#> .
@prefix foaf: <http://xmln.com/foaf/0.1/> .
@prefix rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .

  :joesmith a foaf:Person ;
        foaf:givenname "Joe" ;
        foaf:family_name "Smith" ;
        foaf:homepage <http://www.example.org/~joe/> ;
        foaf:mbox <mailto:[e-mail]> .

在这种情况下，显示<http://www.example.org/~joe/> .

In this case, <http://www.example.org/~joe/> is shown.

我将尝试通过发送电子邮件直接与他们的支持团队联系.

I'll try to contact their support team directly by sending email.

更新1

他们说有四种RDF术语:

They say there are four kinds of RDF terms:

1. URIs
2. 文学
3. 空白节点
4. 其团队将URI视为不真实".

从GraphDB查询日志中，可以确定第四种URI.

From GraphDB query logs, one can ascertain what URIs are of the fourth kind.

BIND (strstarts(str(?p), "http://purl.org/dc/terms/") ||
      strstarts(str(?p), "http://dbpedia.org/ontology/subsidiary") AS ?isMeta)
    FILTER(!strstarts(str(?p), "http://www.w3.org/2002/07/owl#")
              && !strstarts(str(?p), "http://www.w3.org/1999/02/22-rdf-syntax-ns#")
              && !strstarts(str(?p), "http://www.w3.org/2000/01/rdf-schema#")
              && !strstarts(str(?p), "http://www.openrdf.org/schema/sesame#")
              && !strstarts(str(?p), "http://www.ontologydesignpatterns.org/ont/dul/DUL.owl")
              && !strstarts(str(?p), "http://www.w3.org/ns/prov")
              && !strstarts(str(?p), "http://dbpedia.org/ontology/wikiPage")
              && !strstarts(str(?p), "http://dbpedia.org/property/wikiPage")
              && !strstarts(str(?p), "http://www.omg.org/spec/")
              && !strstarts(str(?p), "http://www.wikidata.org/entity/")
              && !strstarts(str(?p), "http://factforge.net/")
              && ?p != <http://dbpedia.org/property/logo>;
              && ?p != <http://dbpedia.org/property/hasPhotoCollection>;
              && ?p != <http://dbpedia.org/property/website>;
              && ?p != <http://dbpedia.org/property/homepage>;
              && ?p != <http://dbpedia.org/ontology/thumbnail>;
              && ?p != <http://xmlns.com/foaf/0.1/depiction>;
              && ?p != <http://xmlns.com/foaf/0.1/homepage>;
            )

更新2

在GraphDB 8.3中，它已通过以下方式修复:

In GraphDB 8.3, it was fixed in some way:

GDB-2076-可视图形:foaf/dbpedia的一致处理 谓词指向IRI，但被视为文字

GDB-2076 - Visual graph: consistent handling of foaf/dbpedia predicates that point to IRIs but are treated as literals

这篇关于GraphDB的可视图不会显示所有三元组的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！