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

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Hi, Tom

I think Example 15 in section 2.13 is what I want….
Can dotnetpdf output like that?

Thanks again!

在 4 Jul 2014，08:17，Tomasz Pluskiewicz <tom...@gm...> 写道：

> 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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>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> ------------------------------------------------------------------------------
>>>>>> 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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>>>>> 
>>>>> 
>>>>> ------------------------------------------------------------------------------
>>>>> 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
>>>> 
>>> 
>>> ------------------------------------------------------------------------------
>>> 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
> 
> ------------------------------------------------------------------------------
> 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