[datacatalogs] [ckan-discuss] [open-government] New Open Government Platform code released

Wed Dec 7 18:43:05 UTC 2011

On Wed, Dec 7, 2011 at 19:22, Christopher Musialek (XT)
<christopher.musialek at gsa.gov> wrote:
> any blogs or other documents
> describing how the syndication between opengov.se and publicdata.eu works?
> I'd be interested in learning more.
>

The W3C page explains the basics. There are two parts:

1. A feed with updates about catalog items in the Atom syndication
format (RFC 4287) See example in [1].
2. A RDF representation of an entry in a catalog based on the DCAT
vocabulary [2].

Process:

By reusing regular feed libraries it is easy to consume the feed. The
client checks an entry in the feed for a link element pointing to the
RDF representation of a catalog item. It downloads the data for the
entry and stores it locally. Since Atom is a chronological record of
changes it is easy to start from "the beginning" or from the point in
time you last updated your local store.

Todo:

- Agree on a representation of deleted items (not part of RFC 4287 but
soon in Atompub tombstones [3]).
- Strategy for topic tagging (in the example I have used Eurovoc which
has permanent URI:s for topics). Maybe some other classification
system is better (UNSPSC?)

Regards,

Peter Krantz

[1]: http://www.opengov.se/feeds/data/
[2]: http://www.w3.org/egov/wiki/Data_Catalog_Vocabulary/Vocabulary_Reference
[3]: http://tools.ietf.org/html/draft-snell-atompub-tombstones-13