RDF文件为excel可读格式 [英] RDF file to excel-readable format

问题描述

我下载了.ttl格式的rdf文件-我是RDF的新手，我试图查看是否可以以某种简单的txt/csv格式获取数据.有人知道该怎么做吗?

I downloaded an rdf file of the format .ttl - I am new to RDF and I am trying to see if I can get the data in a simple txt/csv format of some sort. Does anyone know how to do this?

推荐答案

RDF有一个非常简单的数据模型:只是subject predicate object.您可以通过将文件转换为n-triples来查看:

RDF has a very simple data model: it's just subject predicate object. You can see this by converting your file to n-triples:

 $ rdfcopy myfile.ttl # apache jena

 $ rapper -i turtle myfile.ttl  # rapper (part of librdf)

但这是有限的.假设您从外观漂亮的乌龟文件开始:

But this is limited. Suppose you start with the nice looking turtle file:

 @prefix ex: <http://example.com/>

 <Brian> ex:age 34 ;
         ex:name "Brian Smith" ;
         ex:homepage <http://my.name.org/Brian> .

 <Delia> ex:age 45 ;
         ex:name "Delia Jones" ;
         ex:email <mailto:[e-mail]> .

结果是:

<file:///tmp/Delia> <http://example.com/email> <mailto:[e-mail]> .
<file:///tmp/Delia> <http://example.com/name> "Delia Jones" .
<file:///tmp/Delia> <http://example.com/age> "45"^^<http://www.w3.org/2001/XMLSchema#integer> .
<file:///tmp/Brian> <http://example.com/homepage> <http://my.name.org/Brian> .
<file:///tmp/Brian> <http://example.com/name> "Brian Smith" .
<file:///tmp/Brian> <http://example.com/age> "34"^^<http://www.w3.org/2001/XMLSchema#integer> .

换句话说，所有内容都减少到三列.

In other words everything is reduced to three columns.

您可能更喜欢运行一个简单的sparql查询.它将为您提供更有用的表格结果:

You might prefer running a simple sparql query instead. It will give you tabular results of a more useful kind:

prefix ex: <http://example.com/>

select ?person ?age ?name
where {
    ?person ex:age ?age ;
            ex:name ?name .
}

使用apache jena的arq进行运行:

Running that using apache jena's arq:

$ arq --data myfile.ttl --query query.rq 
---------------------------------
| person  | age | name          |
=================================
| <Delia> | 45  | "Delia Jones" |
| <Brian> | 34  | "Brian Smith" |
---------------------------------

这可能更有用. (您也可以通过添加--results csv来指定CSV输出.)

which is probably more useful. (You can specify CSV output too by adding --results csv).

(相当于librdf是roqet query.rq --data myfile.ttl -r csv)

(The librdf equivalent is roqet query.rq --data myfile.ttl -r csv)

这篇关于RDF文件为excel可读格式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！