tinytim-discuss

[tinyTiM-discuss] Connecting tinyTiM with TMShare

[Lars H. <he...@se...>]

Hi all,

While working on Atomico <http://atomico.googlecode.com/> I wondered
if it would make sense to implement a TopicMapSystem for tinyTiM which
works upon TMShare. The first implementation would be read-only, I
guess.

Something like:

    tmSysFactory.setFeature(
                      "http://tinytim.sf.net/feature/tmShare",
                      "http://iri.which.points.to.a.tmshare.overview");

    TopicMapSystem tmSys = tmSysFactory.newTopicMapSystem();

    for (Locator loc: tmSys.getLocators()) {
        System.out.println(loc);  // Prints out the available topic
                                  // maps at the specified server
    }

    TopicMap tm = tmSys.getTopicMap(loc);

    tmSys.createTopicMap(loc2); ---> Exception, the tmSys is read-only


The topic map and the system could also be writable but there wouldn't
be any synchronisation with the TMShare server (at least not in the
initial version).
    
Thoughts?
    
Best regards,
Lars
-- 
Semagia 
<http://www.semagia.com>

Re: [tinyTiM-discuss] Connecting tinyTiM with TMShare

[Stefan L. <li...@ap...>]

Hi Lars,

I saw a photo that you got the price at TMRA congrats. Can i find some
report and slides from TMRA 2008 somewhere?

stefan

2008/10/21 Lars Heuer <he...@se...>:
> Hi all,
>
> While working on Atomico <http://atomico.googlecode.com/> I wondered
> if it would make sense to implement a TopicMapSystem for tinyTiM which
> works upon TMShare. The first implementation would be read-only, I
> guess.
>
> Something like:
>
>    tmSysFactory.setFeature(
>                      "http://tinytim.sf.net/feature/tmShare",
>                      "http://iri.which.points.to.a.tmshare.overview");
>
>    TopicMapSystem tmSys = tmSysFactory.newTopicMapSystem();
>
>    for (Locator loc: tmSys.getLocators()) {
>        System.out.println(loc);  // Prints out the available topic
>                                  // maps at the specified server
>    }
>
>    TopicMap tm = tmSys.getTopicMap(loc);
>
>    tmSys.createTopicMap(loc2); ---> Exception, the tmSys is read-only
>
>
> The topic map and the system could also be writable but there wouldn't
> be any synchronisation with the TMShare server (at least not in the
> initial version).
>
> Thoughts?
>
> Best regards,
> Lars
> --
> Semagia
> <http://www.semagia.com>
>
>
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>

Re: [tinyTiM-discuss] Connecting tinyTiM with TMShare

[Lars H. <he...@se...>]

Hi Stefan,

> I saw a photo that you got the price at TMRA congrats. Can i find some
> report and slides from TMRA 2008 somewhere?

Thanks, very difficult challenge... ;)

I'll send you the TMShare slides as PDF. I sent them together with the
other presentations and tutorials to Lutz and they should appear at
the TMRA'08 site soon. I guess LMG will write something about TMRA'08.
Maybe rho, too.

Best regards,
Lars
-- 
Semagia 
<http://www.semagia.com>

Re: [tinyTiM-discuss] Connecting tinyTiM with TMShare

[Lars H. <he...@se...>]

[...]
> The topic map and the system could also be writable but there wouldn't
> be any synchronisation with the TMShare server (at least not in the
> initial version).
[...]

Basically, tinyTiM would act as client which consumes the topic maps
provided by the TMShare server. After the TopicMapSystem has been
initialized, the system would contact the TMShare server and load the
latest snapshots from the server (could be done lazily, i.e. the
initial request would just download the information about the provided
topic maps).

After a topic map has been read, tinyTiM would act independent of the
TMShare server (it does not report changes to the server, for
example).

The system could go into a another tinyTiM subproject, the core engine
wouldn't be effected. The TopicMapSystemFactory would look if the
feature "TMShare" is set and then load the specialised TopicMapSystem
(i.e. Class.forName("org.tinytim.tmshare.TopicMapSystem");). The user
would have to include additional libs only if she wants to have that
functionality.

The question is, if it would be valuable to implement such a system or
if it would be a waste of time and effort.

Best regards,
Lars
-- 
Semagia 
<http://www.semagia.com>

Re: [tinyTiM-discuss] Connecting tinyTiM with TMShare

[Lars H. <he...@se...>]

[...]
> The question is, if it would be valuable to implement such a system or
> if it would be a waste of time and effort.

Created a feature request for it:
<https://sourceforge.net/tracker/index.php?func=detail&aid=2189442&group_id=102341&atid=631667>

Feel free to implement it, I am afraid that I won't be able to
implement it in the near future.

Best regards,
Lars
-- 
Semagia 
<http://www.semagia.com>

Re: [tinyTiM-discuss] Connecting tinyTiM with TMShare

[Stefan L. <li...@ap...>]

Hm,

All i found about TMShare was an old paper from Kal [1]. Is it a
product from networkedplanet or some standard? if its not a standard,
we might leave it as a feature request.


[1] http://www.idealliance.org/papers/dx_xmle03/papers/02-03-03/02-03-03.html



2008/10/23 Lars Heuer <he...@se...>:
> [...]
>> The question is, if it would be valuable to implement such a system or
>> if it would be a waste of time and effort.
>
> Created a feature request for it:
> <https://sourceforge.net/tracker/index.php?func=detail&aid=2189442&group_id=102341&atid=631667>
>
> Feel free to implement it, I am afraid that I won't be able to
> implement it in the near future.
>
> Best regards,
> Lars
> --
> Semagia
> <http://www.semagia.com>
>
>
> -------------------------------------------------------------------------
> This SF.Net email is sponsored by the Moblin Your Move Developer's challenge
> Build the coolest Linux based applications with Moblin SDK & win great prizes
> Grand prize is a trip for two to an Open Source event anywhere in the world
> http://moblin-contest.org/redirect.php?banner_id=100&url=/
> _______________________________________________
> tinyTiM-discuss mailing list
> tin...@li...
> https://lists.sourceforge.net/lists/listinfo/tinytim-discuss
>

Re: [tinyTiM-discuss] Connecting tinyTiM with TMShare

[Lars H. <he...@se...>]

Hi Stefan,

> All i found about TMShare was an old paper from Kal [1]. Is it a
> product from networkedplanet or some standard? if its not a standard,
> we might leave it as a feature request.

Ah, sorry, my fault. I expected that everybody is familiar with
the paper.

TMShare homepage:
<http://www.egovpt.org/fg/CWA_Part_1b>

TMShare paper (outdated):
<http://tmra.de/2008/talks/protocol-for-the-syndication-of-semantic-descriptions.html>

I updated the feature request with the links.

Best regards,
Lars
-- 
Semagia 
<http://www.semagia.com>

Re: [tinyTiM-discuss] Connecting tinyTiM with TMShare

[Lars H. <he...@se...>]

[...]
>> All i found about TMShare was an old paper from Kal [1]. Is it a
>> product from networkedplanet or some standard? if its not a standard,
>> we might leave it as a feature request.

It's not a standard, though. It's a protocol based on Atom. Anyway,
the spec is freely available and it is better than nothing. :) The
basic idea was that tinyTiM utilises the snapshots from the server.
The provided fragments will be ignored at least in the initial
version. tinyTiM would contact the server, look for the available
topic maps and download the topic map on request transparently for the
user. The next version could also consider the fragments. I.e.
download all fragments which are published later that the latest
snapshot.

There is also TMRAP but it has slightly other goals. I.e. downloading
a complete map is not possible with TMRAP. TMRAP can be used to ask
a server if it has information about a particular topic, for example.

Implementing a TopicMapSystem for TMShare shouldn't be too hard. The
system would establish a connection to the server, parse the overview
page and use the provided topic maps as initial set of locators
returned by TopicMapSystem.getLocators(). Once the user uses
TopciMapSystem.getTopicMap(Locator), the system downloads the latest
snapshot, deserializes it and returns the topic map. Or the system
download the topic maps in a background task after it has been
initialized.

The TMShareTopicMapSystem would be a bit heavier than the ordinary
TopicMapSystem, so it should be implemented as a tinyTiM subproject.
Further, the TMShareTopicMapSystem would introduce a dependency to a
deserializer package (i.e. tinytim-mio) and may introduce more
dependencies, i.e. to Restlet [1] or to the HTTPClient [2]. Maybe it
can be implemented with the standard Java libs (URLConnection and
friends).

Anyway, that's the rough idea.

[1] <http://www.restlet.org/>
[2] <http://hc.apache.org/>


Best regards,
Lars
-- 
Semagia 
<http://www.semagia.com>