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Re: Semantic Web using Magritte
by Yossi M
::
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Thanks for the input, I had definitely considered that. I was even
looking at XSLT but I really like keeping everything in Smalltalk. I
do indeed need to go many directions since there are many entry points
and services with this application. I also have explored creating new
canvases and doing some things with Readers/Writers like in Pier.
I would do exactly what your describing, but I still am left with the
problem of generating good output from my objects. So for example,
sticking with music, say we have an Album object. I have all kinds of
stuff already for Magritte in there for this object. Now I want to do
something like in my seaside control provide an RDF button that when
clicked, generates the RDF output. I would need to traverse the entire
object/description graph and output the RDF with the album name,
title, etc. and the track listing, and then artist info, etc. It
definitely would suck without the metadata to identify which RDF URI
corresponds with each object in the graph.
Essentially, I am thinking of creating a simpler
serializer/deserializer driven by Magritte descriptions similar to
what I've done before in .NET and Java. I am just not sure if that is
very Smalltalk like as I like to always think there is a better way
than resorting to what I have done in those languages :)
For instance, there is a JSON serializer in .NET where I can say
Album.ToJSON(), or the XML serializer Album.ToXML(). It so happens
that depending on the serializer/deserializer, it will read attributes
I put on my class like [XmlIgnore]. That stuff is really primitive I
think compared to what I can do in Magritte.
I guess I am trying to prevent a future meltdown because as this
application is developed, I am going to have to start going back and
forth with lots of web services to communicate with Java and Flash in
particular. I want to set a good example on the Smalltalk side by
generating everything automagically.
Quoting Philippe Marschall <philippe.marschall@...>:
> Hi
>
> For audioscrobbler I did the opposite, from given XML to Magritte:
> http://source.lukas-renggli.ch/audioscrobbler.html
> The audioscrobbler xml is quite gay and I was surprised when I got it
> working. It is also used for feed parsing of the Seaside homepage.
>
> Cheers
> Philippe
>
> 2007/12/5, smalltalk@... <smalltalk@...>:
>> I was wondering if anyone tried to do any kind of XML mapping using
>> Magritte. I have the requirement to generate RDF from my business
>> objects, so I was thinking of ways to simplify this. My idea was to
>> add something in the Magritte descriptions for each object that
>> pointed to the appropriate URI and schema.
>>
>> This may be more trouble than its worth. I suppose anyone who has done
>> anything with generating XML from Magritte could maybe provide some
>> insight on any hurdles they faced, design ideas, etc.
>>
>> I also am looking at Magritte for simplifying XML serialization in
>> general. My problem overall is that I have to generate all these
>> formats (XML for web service, RSS, ATOM, RDF) and I do not want to
>> have to write a complex parser to even do this 1/2 way dynamically.
>> Are there any other libraries out there that do this already? For
>> instance, I did notice that there is that library (name escapes me)
>> that lets you port your objects between Smalltalk versions by dumping
>> to XML files, so that is somewhat close to what I need to do.
>>
>> I am thinking since I already have a large number of Magritte
>> descriptions, I might as well expand upon that. This will also let me
>> do things like change a schema dynamically and provide easy access
>> memento objects to do things like create a preview of whatever format
>> I am trying to produce. Thoughts?
>>
>>
>>
>> _______________________________________________
>> SmallWiki, Magritte, Pier and Related Tools ...
>> https://www.iam.unibe.ch/mailman/listinfo/smallwiki
>>
>
> _______________________________________________
> SmallWiki, Magritte, Pier and Related Tools ...
> https://www.iam.unibe.ch/mailman/listinfo/smallwiki
>
_______________________________________________
SmallWiki, Magritte, Pier and Related Tools ...
https://www.iam.unibe.ch/mailman/listinfo/smallwiki
looking at XSLT but I really like keeping everything in Smalltalk. I
do indeed need to go many directions since there are many entry points
and services with this application. I also have explored creating new
canvases and doing some things with Readers/Writers like in Pier.
I would do exactly what your describing, but I still am left with the
problem of generating good output from my objects. So for example,
sticking with music, say we have an Album object. I have all kinds of
stuff already for Magritte in there for this object. Now I want to do
something like in my seaside control provide an RDF button that when
clicked, generates the RDF output. I would need to traverse the entire
object/description graph and output the RDF with the album name,
title, etc. and the track listing, and then artist info, etc. It
definitely would suck without the metadata to identify which RDF URI
corresponds with each object in the graph.
Essentially, I am thinking of creating a simpler
serializer/deserializer driven by Magritte descriptions similar to
what I've done before in .NET and Java. I am just not sure if that is
very Smalltalk like as I like to always think there is a better way
than resorting to what I have done in those languages :)
For instance, there is a JSON serializer in .NET where I can say
Album.ToJSON(), or the XML serializer Album.ToXML(). It so happens
that depending on the serializer/deserializer, it will read attributes
I put on my class like [XmlIgnore]. That stuff is really primitive I
think compared to what I can do in Magritte.
I guess I am trying to prevent a future meltdown because as this
application is developed, I am going to have to start going back and
forth with lots of web services to communicate with Java and Flash in
particular. I want to set a good example on the Smalltalk side by
generating everything automagically.
Quoting Philippe Marschall <philippe.marschall@...>:
> Hi
>
> For audioscrobbler I did the opposite, from given XML to Magritte:
> http://source.lukas-renggli.ch/audioscrobbler.html
> The audioscrobbler xml is quite gay and I was surprised when I got it
> working. It is also used for feed parsing of the Seaside homepage.
>
> Cheers
> Philippe
>
> 2007/12/5, smalltalk@... <smalltalk@...>:
>> I was wondering if anyone tried to do any kind of XML mapping using
>> Magritte. I have the requirement to generate RDF from my business
>> objects, so I was thinking of ways to simplify this. My idea was to
>> add something in the Magritte descriptions for each object that
>> pointed to the appropriate URI and schema.
>>
>> This may be more trouble than its worth. I suppose anyone who has done
>> anything with generating XML from Magritte could maybe provide some
>> insight on any hurdles they faced, design ideas, etc.
>>
>> I also am looking at Magritte for simplifying XML serialization in
>> general. My problem overall is that I have to generate all these
>> formats (XML for web service, RSS, ATOM, RDF) and I do not want to
>> have to write a complex parser to even do this 1/2 way dynamically.
>> Are there any other libraries out there that do this already? For
>> instance, I did notice that there is that library (name escapes me)
>> that lets you port your objects between Smalltalk versions by dumping
>> to XML files, so that is somewhat close to what I need to do.
>>
>> I am thinking since I already have a large number of Magritte
>> descriptions, I might as well expand upon that. This will also let me
>> do things like change a schema dynamically and provide easy access
>> memento objects to do things like create a preview of whatever format
>> I am trying to produce. Thoughts?
>>
>>
>>
>> _______________________________________________
>> SmallWiki, Magritte, Pier and Related Tools ...
>> https://www.iam.unibe.ch/mailman/listinfo/smallwiki
>>
>
> _______________________________________________
> SmallWiki, Magritte, Pier and Related Tools ...
> https://www.iam.unibe.ch/mailman/listinfo/smallwiki
>
_______________________________________________
SmallWiki, Magritte, Pier and Related Tools ...
https://www.iam.unibe.ch/mailman/listinfo/smallwiki
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