Re: [dotNetRDF-Develop] Writing <rdf:about> as RDF/XML format

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Tom, Thank you very much, and sorry for not clearing myself
I forgot typing <hasMyClass02>, so the complete one will like this
——————————————————
<rdf:RDF xmlns:rdf=http://www.w3.org/1999/02/22-rdf-syntax-ns#
xmlns:KB="http://protege.stanford.edu/kb#">
 <KB:MyClass01 rdf:about="MyClass01Id">
     <hasProperty01>the value of this property</hasProperty01>
     <hasMyClass02>
       <KB:MyClass02 rdf:about="MyClass02Id">
           <hasProperty02 >the value of this property</hasProperty02>
       </KB:MyClass02>
    </hasMyClass02>   
 </KB:MyClass01>
</rdf:RDF>
——————————————————
(I think this is the correct format of 
——————————————————
<MyClass01Id> <hasProperty01> "the value of this property".
<MyClass01Id> <hasMyClass02> <MyClass02Id> .
<MyClass02Id> <hasProperty02> "the value of this property".
——————————————————
, right?
)
You see, I cannot create that “<KB:MyClass01…” thing but only “<rdf:Description…”,
because I think the target system also might need to know “MyClass01Id” is an instance of type “MyClass01”
(as well as “MyClass02Id” is an instance of type “MyClass02”)
maybe I just cannot do like this? 
I will contact the guys working in target system to look how to solve.

Thank you for the information! I should have read them more carefully.

在 3 Jul 2014，19:57，Tomasz Pluskiewicz <tom...@gm...> 写道：

> First, your example is not a valid RDF/XML. AFAIK text nodes are
> valid, when they are a value of a literal property. Such as Bob is 20
> years old. In NTriples:
> 
> <Bob> <age> 20 .
> 
> could be written as
> 
> <rdf:Description rdf:about="Bob>
>   <age>20</age>
> </rdf:Description>
> 
> or it could use XML attribute
> 
> <rdf:Description rdf:about="Bob age="20" />
> 
> Your example is missing one part of the triple. Either predicate or
> object. The subject is MyClass01ID but what is xxx? A full statement
> about MyClass01ID requires that there is a verb (predicate/property)
> and the value (object).
> 
> I must stress again, that a RDF-aware system cannot require any
> specific formatting of a RDF/XML document. I understand that maybe
> other RDF formats aren't supported but in the end it is the data that
> s important and it can be written in various ways without chaging the
> meaning.
> 
> I could also suggest that you read some introductory documents about
> RDF like [1] and maybe RDF/XML documentation [2], since you are
> working with that format. Though by using dotNetRDF or any other
> library you shouldn't be at all concerned with it. It is the graph
> that matters and you should never really have to manipulate raw
> RDF/XML document save maybe for debugging.
> 
> Tom
> 
> [1] http://www.w3.org/TR/rdf11-primer/
> [2] http://www.w3.org/TR/rdf-syntax-grammar/
> 
> On Thu, Jul 3, 2014 at 5:39 PM, son...@gm...
> <son...@gm...> wrote:
>> Thank you for the help
>> 
>> but I am sorry that I still not very clear how to do
>> the target system requires this format:
>> 
>> ------------------------------------
>> <MyClass01 rdf:about="MyClass01ID">
>>  xxx
>> </MyClass01>
>> ------------------------------------
>> How can i create this (not rdf:Description xxx)?
>> 
>> Best Wishes
>> 
>> ________________________________
>> son...@gm...
>> 
>> From: Tomasz Pluskiewicz
>> Date: 2014-07-03 15:21
>> To: dotNetRDF Developer Discussion and Feature Request
>> Subject: Re: [dotNetRDF-Develop] Writing <rdf:about> as RDF/XML format
>> In RDF this is a relation like any other. You state exactly what you
>> described, that a resource is of a given type. And you declare that
>> statement with a triple like any other fact about your resources.
>> 
>> You use the predicate rdf:type [1]. There is a handy class called
>> VDS.RDF.Parsing.RdfSpecsHelper, which contains the correct Uri of the
>> rdf namespace.
>> 
>> On Thu, Jul 3, 2014 at 4:03 PM, son...@gm...
>> <son...@gm...> wrote:
>>> Thank you so much Tom!
>>> 
>>> there only just one question left:
>>> Since the target system need to know the class type, i.e.,
>>> ==> MyClass01Id is a MyClass01
>>> How can I express this in dotnetrdf?
>>> 
>>> 
>>> ________________________________
>>> son...@gm...
>>> 
>>> From: Tomasz Pluskiewicz
>>> Date: 2014-07-01 21:53
>>> To: dotNetRDF Developer Discussion and Feature Request
>>> Subject: Re: [dotNetRDF-Develop] Writing <rdf:about> as RDF/XML format
>>> On Tue, Jul 1, 2014 at 12:23 PM, son...@gm...
>>> <son...@gm...> wrote:
>>>> Thank you Tom!
>>>> 
>>>> You are right, basically what I am trying to do is converting following
>>>> class:
>>>> -------------------------------------
>>>> class MyClass01 {
>>>>  public string Property01 {get; set;}
>>>>  public MyClass02 myClass02 {get; set;}
>>>> }
>>>> //the instance of class has its own unique id
>>>> 
>>> 
>>> I strongly suggest that you think in terms of triples or graphs and
>>> not their serializaitions. So given an instance of MyClass01 you could
>>> have the following data
>>> 
>>> <MyClass01Id> <hasProperty01> "the value of this property".
>>> <MyClass01Id> <hasMyClass02> <MyClass02Id> .
>>> 
>>> This is all you need. These two triples would be stored the way you
>>> used in the earlier email (remember to use proper URIs). I know
>>> nothing about MyClass02 at this point, just the hypothetical id. It
>>> would add further similar triples
>>> 
>>> Notice how this notation (NTriples/Turtle) removes any unnecessary
>>> syntactic clutter and leaves only the subjects, predicates and
>>> objects.
>>> 
>>>> 
>>>> -------------------------------------
>>>> to this kind of text
>>>> -------------------------------------
>>>> <rdf:RDF xmlns:rdf=http://www.w3.org/1999/02/22-rdf-syntax-ns#
>>>> xmlns:KB="http://protege.stanford.edu/kb#">
>>>>  <KB:MyClass01 rdf:about="that unique id">
>>>>      <hasProperty01 >the value of this property</hasProperty01>
>>>>      <MyClass02 rdf:about="the unique id">
>>>>            //MyClass02's content
>>>>      </MyClass02>
>>>>  </KB:EndToEndBlueprintRoot>
>>>> </rdf:RDF>
>>>> -------------------------------------
>>>> 
>>> 
>>> You must keep in mind that with RDF/XML there are multiple ways to
>>> write the same document. It means that the structure can change, while
>>> the actual data doesn't.
>>> 
>>>> 
>>>> Also I have to use this kind of format because it is the input of another
>>>> system I have to use...
>>>> 
>>> 
>>> In memory you keep the data (triples) and dotNetRDF helps you save it
>>> in one of the RDF formats. If the other system requires that you use
>>> RDF/XML, that's fine but you could save it as Turtle or Notation3.
>>> 
>>>> 
>>>> Thank you again!
>>>> 
>>>> ________________________________
>>>> son...@gm...
>>>> 
>>>> From: Tomasz Pluskiewicz
>>>> Date: 2014-07-01 10:13
>>>> To: dotNetRDF Developer Discussion and Feature Request
>>>> Subject: Re: [dotNetRDF-Develop] Writing <rdf:about> as RDF/XML format
>>>> On Tue, Jul 1, 2014 at 7:44 AM, son...@gm...
>>>> <son...@gm...> wrote:
>>>>> Hi, all
>>>>> 
>>>>> I am trying to write a RDF/XML like follows:
>>>>> -------------------------------------------------------
>>>>> <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
>>>>> xmlns:KB="http://protege.stanford.edu/kb#">
>>>>>  <KB:EndToEndBlueprintRoot
>>>>> rdf:about="http://protege.stanford.edu/kb#DemoRootImagineID001">
>>>>>    xxxxx
>>>>>  </KB:EndToEndBlueprintRoot>
>>>>> </rdf:RDF>
>>>>> -------------------------------------------------------
>>>>> 
>>>> 
>>>> First of all this document is not a valid RDF/XML.
>>>> 
>>>>> Here is my code
>>>>> -------------------------------------------------------
>>>>>            INode s = g.CreateUriNode("kb:"+"EndToEndBlueprintRoot");
>>>>>            INode p = g.CreateUriNode("rdf:about");
>>>>>            INode o = g.CreateUriNode("kb:"+"DemoRootImagineID001");
>>>>> 
>>>>>            g.Assert(new Triple(s,p,o));
>>>>> 
>>>>>            RdfXmlWriter rxw = new RdfXmlWriter();
>>>>>            string res = VDS.RDF.Writing.StringWriter.Write(g, rxw);
>>>>> -------------------------------------------------------
>>>>> 
>>>> 
>>>> Secondly, the rdf:about is just a RDF/XML syntax feature and not a
>>>> predicate. It denotes that part of an RDF/XML document is grouped with
>>>> a common subject. Please read [1].
>>>> 
>>>> You should think in terms of triples, which define a relation
>>>> (predicate) between two objects (subjects and objects). That is much
>>>> like in natural language.
>>>> 
>>>>> 
>>>>> But only got this
>>>>> -------------------------------------------------------
>>>>> <rdf:RDF xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
>>>>> xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
>>>>> xmlns="http://example.org/"
>>>>> xmlns:a="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
>>>>> xmlns:kb="http://protege.stanford.edu/kb#"
>>>>> xmlns:ns0="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
>>>>> xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
>>>>>  <rdf:Description rdf:about="&kb;EndToEndBlueprintRoot">
>>>>> xxx
>>>>>    <ns3:about xmlns:ns3="http://protege.stanford.edu/system#"
>>>>> rdf:resource="&kb;DemoRootImagineID001" />
>>>>>  </rdf:Description>
>>>>> </rdf:RDF>
>>>>> -------------------------------------------------------
>>>>> 
>>>>> Is my usage correct? or how can I output the format that I want?
>>>>> What is the appropriate writing of "rdf:about"?
>>>>> 
>>>> 
>>>> You probably mean kb:DemoRootImagineID001 as you subject, that is the
>>>> thing you want to describe in your document. Is that right?
>>>> 
>>>> Please describe what kind of data you want your document to contain.
>>>> 
>>>>> 
>>>>> Any suggestion will be appreciated!
>>>>> 
>>>>> ________________________________
>>>>> son...@gm...
>>>>> 
>>>> 
>>>> Regards,
>>>> Tom
>>>> 
>>>> [1]
>>>> 
>>>> 
>>>> http://stackoverflow.com/questions/7118326/differences-between-rdfresource-rdfabout-and-rdfid
>>>> 
>>>> 
>>>> 
>>>> ------------------------------------------------------------------------------
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>>>> 
>>>> 
>>>> ------------------------------------------------------------------------------
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>>>> Turn processes into business applications with Bonita BPM Community
>>>> Edition
>>>> Quickly connect people, data, and systems into organized workflows
>>>> Winner of BOSSIE, CODIE, OW2 and Gartner awards
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>>> 
>>> 
>>> ------------------------------------------------------------------------------
>>> Open source business process management suite built on Java and Eclipse
>>> Turn processes into business applications with Bonita BPM Community
>>> Edition
>>> Quickly connect people, data, and systems into organized workflows
>>> Winner of BOSSIE, CODIE, OW2 and Gartner awards
>>> http://p.sf.net/sfu/Bonitasoft
>>> _______________________________________________
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>>> 
>>> ------------------------------------------------------------------------------
>>> Open source business process management suite built on Java and Eclipse
>>> Turn processes into business applications with Bonita BPM Community
>>> Edition
>>> Quickly connect people, data, and systems into organized workflows
>>> Winner of BOSSIE, CODIE, OW2 and Gartner awards
>>> http://p.sf.net/sfu/Bonitasoft
>>> _______________________________________________
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>> 
>> ------------------------------------------------------------------------------
>> Open source business process management suite built on Java and Eclipse
>> Turn processes into business applications with Bonita BPM Community Edition
>> Quickly connect people, data, and systems into organized workflows
>> Winner of BOSSIE, CODIE, OW2 and Gartner awards
>> http://p.sf.net/sfu/Bonitasoft
>> _______________________________________________
>> dotNetRDF-develop mailing list
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>> https://lists.sourceforge.net/lists/listinfo/dotnetrdf-develop
>> 
>> ------------------------------------------------------------------------------
>> Open source business process management suite built on Java and Eclipse
>> Turn processes into business applications with Bonita BPM Community Edition
>> Quickly connect people, data, and systems into organized workflows
>> Winner of BOSSIE, CODIE, OW2 and Gartner awards
>> http://p.sf.net/sfu/Bonitasoft
>> _______________________________________________
>> dotNetRDF-develop mailing list
>> dot...@li...
>> https://lists.sourceforge.net/lists/listinfo/dotnetrdf-develop
>> 
> 
> ------------------------------------------------------------------------------
> Open source business process management suite built on Java and Eclipse
> Turn processes into business applications with Bonita BPM Community Edition
> Quickly connect people, data, and systems into organized workflows
> Winner of BOSSIE, CODIE, OW2 and Gartner awards
> http://p.sf.net/sfu/Bonitasoft
> _______________________________________________
> dotNetRDF-develop mailing list
> dot...@li...
> https://lists.sourceforge.net/lists/listinfo/dotnetrdf-develop