SAIL对象的Sparql端点 [英] Sparql endpoint for SAIL object

问题描述

我已经使用tinkerpop蓝图创建了一个SAIL对象，以将RDF数据加载到Graph数据库中. Ive成功地成功加载了数据.有问题的Graph数据库没有sparql端点来运行我的查询混合测试驱动程序.有谁知道是否可能，如果可以，如何使sparql端点可通过HTTP服务器供我的测试驱动程序Java代码访问?我知道4store，BigData和其他一些商店都有自己的内置sparql服务器进行查询.我想知道如果基础图数据库不提供自己的服务器实现，是否有可能使sparql服务器可用于我的Sail对象存储.

I have created a SAIL object using tinkerpop blueprints to load RDF data into a Graph database. Ive successfully managed to load the data. The Graph database in question does not have a sparql endpoint to run my query mix test driver. Does anyone know if it possible and if so then how to make a sparql endpoint accessible to my test driver java code over an HTTP server? I am aware 4store, BigData and some other stores have their own built in sparql servers for querying. I am wondering if it is possible to make a sparql server like that available for my Sail object store if the underlying graph database does not provide its own implementation of the server.

谢谢.

这是我取得的进步:

我已经通过tomcat部署了open-rdf芝麻战争来访问服务器，这就是准备存储库(数据已加载)的距离

I have deployed open-rdf sesame war via tomcat to get access to the server and this is how far I got with preparing the repository (the data is already loaded)

OrientGraph g = new OrientGraph("remote:host/Test", "admin", "admin");  
Sail sail = new GraphSail<KeyIndexableGraph>(g);  
Repository rep = new SailRepository(sail);  
rep.initialize();  
RepositoryConnection conn = rep.getConnection();  

我不确定如何处理查询，在一个单独的文件中，我使用以下方法进行了一些基本查询:

I am not sure how to handle the querying, in a separate file I did some basic querying using: https://github.com/tinkerpop/blueprints/wiki/Sail-Ouplementation.

但是，我注意到使用此方法进行的查询非常有限，因为只能与边缘进行基本的模式匹配.

However, I noticed that the querying done using this is very limited in the sense that only basic patttern matching with edges was possible.

例如，一个带有谓词的基本查询: 选择不同的?var1?var2，其中{?var2谓词?var1.}

For example, a basic query with predicate like: select distinct ?var1 ?var2 where { ?var2 predicate ?var1 .}

如果我也提供主题， 选择不同的?var1，其中{主语谓词?var1.}

Whereas if I also provide the subject, select distinct ?var1 where { subject predicate ?var1 .}

即使我在文件中看到相应的结果，也不会返回任何结果.

returns no results even when I can see a corresponding result in the file.

我的问题是如何运行完整的sparql查询?端点会帮忙吗?

My question here is how can I run full sparql queries? Will the endpoint help?

推荐答案

如果您的图形已启用蓝图，则可以通过Graph实例. rel ="nofollow"> Rexster 并使用SPARQL扩展名:

If your graph is in Blueprints-enabled then you can expose the Graph instance via Rexster and use the SPARQL extension:

https://github.com/tinkerpop/rexster/树/大师/rexster-kibbles/sparql-kibble

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