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

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I do not know.

Rob, please help us out here :)

On Fri, Jul 4, 2014 at 9:42 AM, song xin <son...@gm...> wrote:
> 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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>>>>>>> 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
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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
>>>
>>>
>>> ------------------------------------------------------------------------------
>>> 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