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Re: Yet Another LOD cloud browser

From: Hugh Glaser <hg@ecs.soton.ac.uk>
Date: Sat, 16 May 2009 01:13:56 +0100
To: Kingsley Idehen <kidehen@openlinksw.com>
CC: Sherman Monroe <sdmonroe@gmail.com>, "semantic-web@w3.org" <semantic-web@w3.org>, Linked Data community <public-lod@w3.org>, David Huynh <dfhuynh@alum.mit.edu>
Message-ID: <EMEW3|3a673c2d60bde70a962931b359ebde6bl4F1E902hg|ecs.soton.ac.uk|B1A9%hg@ecs.soton.ac.uk>
Hi Kingsley,
I think you were doing the conflating, which is why you confused me talking about tabs :-)
I was never talking about anything other than
being labelled a "linked data browser".
In fact, if you see my other post, you will see that I suggest http://lod.openlinksw.com/ as a linked data browser!

On 16/05/2009 01:06, "Kingsley Idehen" <kidehen@openlinksw.com> wrote:

Hugh Glaser wrote:
> I have difficulty in interpreting what you say - we are looking at the same "linked data browser" page?:
> http://ec2.monrai.com:8890/facets/
> All I can see is a page that says: "Lookup things named "" " So the only possibility of linked data browsing is to put in something with a name.
> So I put something topical in (from this list).
> Since I see
> ...
>   <Station rdf:about="http://ontologi.es/rail/stations/gb/MAN">
>     <foaf:name xml:lang="en">Manchester Piccadilly</foaf:name>
> ...
> I try "Manchester Piccadilly" and get some response, but nothing leads me to
> http://ontologi.es/rail/stations/gb/MAN.rdf or any of the data I find there.
> Similarly topical from this list, I find no way of browsing http://foaf.qdos.com/lastfm/people/keithalexander#me or getting to that page by searching for "Keith Alexander".
You are kind of conflating two things:

1.  http://ec2.monrai.com:8890/facets/  -- a client interacting with a
2.  http://lod.openlinksw.com -- an instance of a Quad Store (Virtuoso)
that includes a Faceted Browsing Engine that is also accessible via REST
APIs (in addition to the  SPARQL protocol and other services)
> I also see no way of doing "3. Raw URI Lookup" of this URI.
You can do a raw URI lookup at: http://lod.openlinksw.com , there are 3
Tabs on the home page (self explanatory etc..).
> I assert that if this is a "linked data browser", then since
> http://ontologi.es/rail/stations/gb/MAN.rdf conforms (I think) to "How to Publish Linked Data on the Web", then I should be able to browse it using the browser.
My responses have nothing to do with: http://ec2.monrai.com:8890/facets/ .

I am sure you know ODE can do what you describe.

> If I can't, then it is not a "linked data browser".

If you are referring to: http://lod.openlinksw.com, then I am sure you
know ODE [1] is just a VAD installation away, we just haven't installed
ODE or enabled sponging on this instance because it is still a in "hot
staging" mode.
> Of course, this browser is very capable of browsing your excellent single site, but that is not the same thing, I am sorry to say.
> Best
> Hugh
> PS
> Thank you for pointing out this is not in EC2.
http://ec2.monrai.com:8890/facets/ -- is on EC2. I am not taking about
it though.

> I have difficulty working out what is in the cloud and what is not, as it appears to be opaque, which I think is the idea.
Maybe, but I think we are done with what this means - in our world view
-  in prior conversations etc..

The most important thing Sherman is trying to do is provide an
alternative interface to <http://lod.openlinksw.com> and validate the
prowess of the REST API that was built to address the challenge known
as: Web Scale Faceted Browsing :-)

As per my response to David earlier, more interesting revelations to
come next week.

> On 15/05/2009 21:16, "Kingsley Idehen" <kidehen@openlinksw.com> wrote:
> Hugh Glaser wrote:
>> Dear Sherman,
>> It's great to have more activity, and all strength to you.
>> However, I would like to ask if you could modify some of your description to more accurately reflect what it is doing.
>> Referring to the dataset as the "public LOD cloud instance of Virtuoso" suggests that it is browsing all the LOD data, which it is not.
>> Also, I am not sure it is right to call it a "linked data browser"; I can't work out how to use it to browse any other sites than the Virtuoso EC2 one.
> Hugh,
> What do you mean by: I can't work out how to use it to browse any other
> sites than the Virtuoso EC2 one? For starters, this isn't an EC2 hosted
> instance. Its a huge Quad Store with 4.5 Billion+ (and counting)
> triples. You find entities and their descriptions via:
> 1. Full Text Search Patterns
> 2. Entity URI Lookup by Label
> 3. Raw URI Lookup
> There is a Tab for each.
> When you find an entity and open up its description, you can click on
> "Statistics" to explore other relationships and/or how we've handle
> owl:sameAs, IFPs etc..
> If the above, don't get you where you want to be, then you can also
> start from the VoiD graph at: http://lod.openlinksw.com/void/Dataset.
> And of course, if all fails, you can simply use the SPARQL endpoint at:
> http://lod.openlinksw.com/sparql .
> If data is missing simply give me an example of a query that works in
> your data space and we'll look into why its missing in ours.
> Kingsley
>> Best
>> Hugh
>> PS Sorry to those who feel I have been here before, but I think there are important things here.
>> --
>> Hugh Glaser,  Reader
>>               Dependable Systems & Software Engineering
>>               School of Electronics and Computer Science,
>>               University of Southampton,
>>               Southampton SO17 1BJ
>> Work: +44 (0)23 8059 3670, Fax: +44 (0)23 8059 3045
>> Mobile: +44 (0)75 9533 4155, Home: +44 (0)23 8061 5652
>> http://www.ecs.soton.ac.uk/people/hg
>> On 13/05/2009 18:42, "Sherman Monroe" <sdmonroe@gmail.com> wrote:
>> Hi All,
>> Taking inspiration from Longwell[1] and Parallax[2], I present yet another linked data browser[3]. It uses the Virtuoso Facets Web service API [4] and runs against the public LOD cloud instance of Virtuoso [5]. I believe such faceted search UIs could be a nice compromise between SPARQL and a full-blown Cypher-based NL user interface[6].
>> Feedback appreciated.
>> Hints:
>> - Click a breadcrumb at the top to navigate your query path
>> - Click "Your query" to view the filter details, click the nodes there to navigate the path, click the icons there to modify the filter
>> - Click the green plus sign button to add a filter
>> - Click the blue undo button to unbound a node value
>> Notes:
>> I was amazed in the many instances where I got better results from LOD dataspace than from Google/Technorati/Wikipedia. For example, searching Monopoly, then filtering to the umbel-sc:MentalSituations category gave me a nice (and in some cases humorous) list of Monopoly knock-offs. I tried finding such a list on the WWW with no luck <http://www.google.com/search?q=Monopoly%20knockoffs> . Kingsley tells me that Entity Rank [4] has to do with this, but I wonder whether this quality will stick as the cloud increases.
>> References:
>> [1] http://simile.mit.edu/wiki/Longwell
>> [2] http://mqlx.com/~david/parallax/
>> [3] http://ec2.monrai.com:8890/facets
>> [4] http://lod.openlinksw.com/fct/facet_doc.html
>> [5] http://lod.openlinksw.com
>> [6] http://cypher.monrai.com
>> Enjoy,
> --
> Regards,
> Kingsley Idehen       Weblog: http://www.openlinksw.com/blog/~kidehen
> President & CEO
> OpenLink Software     Web: http://www.openlinksw.com



Kingsley Idehen       Weblog: http://www.openlinksw.com/blog/~kidehen
President & CEO
OpenLink Software     Web: http://www.openlinksw.com
Received on Saturday, 16 May 2009 00:15:26 UTC

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