rdfland rdfproc:添加RDF文字

Question

在rdfproc/redland我如何添加一个类型文字?手册页说:

   add-typed SUBJECT PREDICATE OBJECT OBJECT-LANG OBJECT-URI [CONTEXT]
          Add the triple with the datatyped literal object to the graph, in the optional Redland context if  CONTEXT  is given.

my RDF file:

$ xmllint test.rdf
<?xml version="1.0" encoding="utf-8"?>
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
</rdf:RDF>

我试着:

$ rdfproc  --storage file test.rdf  add-typed "http://my/subject" "http://my/predicate" "2015-50-17T15:50:00"  "fr" "http://www.w3.org/2001/XMLSchema#dateTime"

，但得到以下错误:

rdfproc: cannot have missing triple parts for add-typed

一个简单的'add'就可以了。

$ rdfproc  --storage file test.rdf  add "http://my/subject" "http://my/predicate" "2015-50-17T15:50:00"  && xmllint test.rdf
rdfproc: Added triple to the graph
<?xml version="1.0" encoding="utf-8"?>
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xml:base="file:///home/lindenb/path/test.rdf">
  <rdf:Description rdf:about="http://my/subject">
    <ns0:predicate xmlns:ns0="http://my/">2015-50-17T15:50:00</ns0:predicate>
  </rdf:Description>
</rdf:RDF>

版本:

$ rdfproc -version
1.0.14

Answer 1

不能同时指定语言和数据类型。

若要省略其中之一，请在命令行中提供-。例如:

rdfproc -n --storage sqlite test.sq add-typed "http://my/subject" "http://my/predicate" "2015-50-17T15:50:00" - "http://www.w3.org/2001/XMLSchema#dateTime"

我将存储类型更改为sqlite，并添加了创建新存储-n的选项-文件存储产生另一个错误rdfproc: Warning - Model does not support contexts rdfproc: Failed to add triple to the graph，我没有阅读足够的源代码来找出如何解决这个问题。