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demo, Linked Data

Linked Data Camp Vienna hacking wrap-up

Jürgen Umbrich and I virtually participated in the LDC09 session regarding datasets dynamics.

Over the past couple of days, we hacked a little demo on a distributed change notification system for Linked Open Data, based on voiD+dady and (a slightly modified version ) of an Atom feed. Here is the overall setup:

In case you want to play around with it yourself, you can check out the source code as well. Feedback and feature requests welcome ;)

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About woddiscovery

Web of Data researcher and practitioner

Discussion

2 thoughts on “Linked Data Camp Vienna hacking wrap-up

  1. I’m not sure I get the point of what it’s about… could you possibly explain that in terms more understandable for the man on the (Linked Data) street ?

    Any example of an ATOM snippet ?

    Posted by Olivier Berger | 2009-12-02, 15:27
  2. Olivier,

    Glad you asked ;) So, the overall goal is to enable Linked Data consumers (applications, other data publisher, etc.) to keep track of changes in a LOD dataset. There are a couple of use cases [1], [2] and some proposed solutions in terms of vocabularies and protocols.

    Our idea was: KISS. So, reusing existing technologies as far as possible. So we propose and demoed how to extend Atom to implement the notification mechanism.

    The example Atom snippet (see [3]) looks like:

    <entry>
    <title>update event:1259750391694</title>
    <link rel="alternate" href="http://140.203.155.46/dcm/changes?id=1259750030627" />
    <link rel="data-added" href="http://140.203.155.46/dcm/1259750391694" />
    <link rel="data-removed" href="http://140.203.155.46/dcm/1259750391695" />
    <id>urn:dcm:dady:1259750391694</id>
    <updated>2009-12-02T10:39:51Z</updated>
    <summary>1 statements have been added to and 1 statements have been removed from http://ld2sd.deri.org/dady/publisher/test-dataset.rdf </summary>
    </entry>

    Cheers,
    Michael

    Posted by woddiscovery | 2009-12-02, 15:35

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