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

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The document actually represents 5 triples. Those you mention and
additionally the rdf:type property for both resources.

<MyClass01Id> rdf:type <KB:MyClass01> .
<MyClass02Id> rdf:type <KB:MyClass02> .

This is implicit by using a typed XML node.

<KB:MyClass02 rdf:about="MyClass02Id" />

is equivalent to (relevent parts ommitted)

<rdf:Description><rdf:type>type</rdf:type></rdf:Descritpion>.

Please have a look at section 2.13 of RDF syntax documentation [1].

I don't think that it is possible with dotNetRDF to enforce one way or
another of writing RDF/XML documents.

Rob, is it?

Tom

[1] http://www.w3.org/TR/rdf-syntax-grammar/#section-Syntax-typed-nodes

On Fri, Jul 4, 2014 at 8:48 AM, song xin <son...@gm...> wrote:
> 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
>>>>> http://p.sf.net/sfu/Bonitasoft
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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
>>>> http://p.sf.net/sfu/Bonitasoft
>>>> _______________________________________________
>>>> dotNetRDF-develop mailing list
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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
>>>> 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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>>>
>>> ------------------------------------------------------------------------------
>>> 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