Hi all,
interesting discussion. For my working regarding FB, I distinguish three
key aspects that are strongly related in the concept of FB:
1) The kind of (meta) data
The main principle is based on the principle of Faceted Classification
[1]. I also like to refer to Yee et al [2] who built in my opinion the
first FB.
- data is composed of orthogonal sets of categories
- data (or an individual facet value) may be flat (“by Pablo Picasso”)
or hierarchical (“located in Vienna > Austria > Europe”)
- data (or an individual facet value) may be singlevalued or multi-valued.
Having the RDF data model as foundation, this definition will fit well.
2) Query
Queries against the (meta) data are not leading to a non-empty result sets.
Since the SPARQL queries could easily led to empty results, something
like a pre-execution is required to avoid that. Thus, tools like Solr or
Eleastic Search come in to play...
3) The UI
Faceted browsing is a suitable approach to assist end-users in searching
within a mostly unknown data space. They always filter the collection by
selecting only from existing characteristics of the remaining items.
This is easier to handle than a free, textual query specification and it
assures not to deliver an empty result set.
Since the paradigm is widely used in e-commerce application (amazon,
ebay,...), also end-user know it well.
The rest are implementation specific details, that, in my opinion are
good starting point to specify criteria for you investigation, e.g.,
- data access: single endpoint or multiple
- schema: are RDF schemas required or not
- data caching: direct access to endpoints or with an indexer
- facet representation
- result representation
...
Since I'm also interested in an end-user friendly solution to browse
Linked Data sets, I'd like to support the investigation, if possible.
Cheers,
Martin
1: http://www.upriss.org.uk/papers/iccs00.pdf
2: http://flamenco.berkeley.edu/papers/flamenco-chi03.pdf
Am 27.04.2015 um 21:08 schrieb Kingsley Idehen:
On 4/27/15 9:02 AM, Christian Morbidoni wrote:
Honestly I got a bit stuck asking myself "What exactly am I looking
for"? In other words: what is exactly a faceted browser for RDF data?
Great point!
All:
What is "Faceted Browsing" ?
What are the distinguishing characteristics (features, properties,
attributes) of a Class of Thing referred to literally as a "Faceted
Browser" ?
If we cannot build a useful discussion thread based on this, what are we
saying to both ourselves and the rest of the world re., the usefulness
of the following:
[1] RDF Language
[2] Linked Open Data constructed using RDF Language.
It's the year 2015, we can (and MUST) do better.
Let's get some responses going, in the form of attributes and associated
comments describing said attributes literally, at the very least.
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