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Re: Yet Another LOD cloud browser

From: Hugh Glaser <hg@ecs.soton.ac.uk>
Date: Fri, 15 May 2009 23:18:42 +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|e8a62bb7c64c68f7c9348846ebed8229l4ENIv02hg|ecs.soton.ac.uk|B19B%hg@ecs.soton.ac.uk>
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".

I also see no way of doing "3. Raw URI Lookup" of this URI.

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

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.
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.

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
Received on Friday, 15 May 2009 22:20:22 UTC

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