RE: Re: NOT SPAM: a request for information!

Hi BPA,

I'm very impressed by the work that you're doing.
I see from the white paper that you're representing the facets as RDF
properties, was wondering if/how you impose the disjointed nature of facets
over and above the taxonomies. I briefly looked into expressing XFML in RDF,
and found there was everything available within the RDF(S) layer except this
aspect, which is available in DAML+OIL or OWL. (I was told at the time that
this constraint in XFML was intended to be handled by the human and/or
application rather than expressed in the language, so effectively XFML info
could be expressed in RDF(S) as-is).

Cheers,
Danny.

> -----Original Message-----
> From: bpallen777 [mailto:[email protected]]
> Sent: 13 June 2003 17:59
> To: [email protected]
> Subject: [facetedclassification] Re: NOT SPAM: a request for
> information!
>
>
> Bob- The amount of work depends on how much metadata is available to
> the application developer, and how it lends itself to use in a
> faceted retrieval scheme. One observation to be made based on our
> experience is that there is far more metadata to be leveraged for
> this kind of application than people tend to assume.
>
> In many commercial applications, we find that a significant amount
> of effort has already been spent in record classification by
> database designers and administrators. This existing metadata can be
> leveraged in a faceted retrieval system. For example, in an
> ecommerce catalog, products are often already classified by product
> type/category, target customer, price range, etc. In our system, we
> simple provide a way to automatically connect to relational tables
> containing such data, transform it into an RDF representation, and
> then automatically generate a navigation interface on top of the
> unified representation. In this way, a usable faceted search system
> can be generated in a few man-hours or less.
>
> We also find simple Dublin Core metadata, which is readily available
> through many content management systems, can be fruitfully exploited
> to provide faceted search over tagged content. While this is not a
> faceted classification scheme in the traditional sense of a set of
> facets crafted for a specific set of end-user retrieval needs, it
> can nevertheless provide more usable navigation than is possible
> with traditional free text or parametric retrieval approaches.
> Coupled with named entity and noun phrase extraction techniques,
> this can lead to a point of departure for crafting a more
> sophisticated faceted classification scheme, while in the short term
> providing real benefit to users.
>
> With the proliferation of XML-based approaches to content management
> (particularly those associated with weblog management systems), the
> amount of metadata that can be leveraged to build faceted schemes
> will continue to expand. Again, in our system, one transforms the
> metadata available in XML feeds and/or repositories into an RDF
> representation and continues from there.
>
> In many cases, however, the intellectual effort of creating a
> classification scheme, specifying facets and providing a framework
> for a combination of human- and machine-generated metadata creation
> and harvesting will need to be performed. However, our intent is to
> provide tools that will, through the use of standards such as RDF,
> provide a framework so that such efforts can be easily shared,
> reused and propagated through the agency of the Semantic Web.  Our
> goal is to allow information architects to write RDF to create
> working navigation systems in precisely the same way web page
> designers write HTML to create web pages. In doing so, we can
> make "view source" work for information architectures in a manner
> analogous to the way it works for web pages today.
>
> For example, if you go to the DC-2002 example cited in my previous
> post, you'll see an "RDF Metadata" button in the lower left hand
> corner of the page. Clicking on that link will show you the source
> RDF that defines the running navigation application. It contains a
> simple controlled vocabulary using Z39.19 standards, a temporal
> hierarchy, a simple classification scheme for conference events, and
> the presentation metadata records. This took about a day to put
> together based on the raw material on the conference website. By
> providing the RDF representation directly, it now becomes possible
> for others to reuse the scheme to apply it to other collections and
> extend it for other uses.
>
> In summary, there are a number of tools and approaches that we use
> to assist in the classification process:
>
> - Extract metadata directly from relational databases and XML feeds;
> - Support incremental development of a faceted classification from
> an initial set of Dublin Core metadata
> - Use named entity and noun phrase extraction tools to create
> subjects from unstructured content;
> - Author, aggregate and reuse existing RDF representations of
> vocabularies and classification schemes
>
> regards, BPA
>
>
>
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