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DIPARTIMENTO DI ELETTRONICA E INFORMAZIONE
PhDAY 2011
Exploratory computing designing engines for discovery-driven user experiences
Luigi Spagnolo: [email protected]
DIPARTIMENTO DI ELETTRONICA E INFORMAZIONE
Exploration vs. search
• E.g. a website presenting a research lab • Search task:
§ "find recent significant publications on a certain argument and/or by certain authors"
• Exploratory user experience: § understand the research interests of the lab (and
of its members) and how they evolved over time. § Evaluate the quality of research in terms of
publications and of collaboration with other universities.
DIPARTIMENTO DI ELETTRONICA E INFORMAZIONE
Exploration: a definition
• Moving into a information space representing a certain domain § The purpose: discovering additional information
the properties (the facets) of the objects in it § A sort of user-centred, interactive data mining § The query is not aimed at finding a set of objects,
but rather… § At defining the target set of objects whose
properties are observed and analysed
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DIPARTIMENTO DI ELETTRONICA E INFORMAZIONE
My proposal: FELIS
• Faceted Exploration for Leverage of Information Systems
• A comprehensive framework for exploratory user experiences, covering: § knowledge representation and querying § widgets and interaction patterns for
semantic faceted explorations § information visualization strategies to
highlight the correlation between properties, supported by exploration metrics
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DIPARTIMENTO DI ELETTRONICA E INFORMAZIONE
FelisQL • A language for knowledge representation and
querying § An extension to LISQL (Ferré 2011, University of Rennes I) § Can be seen either as a different notation for RDF/SPARQL
or as an autonomous, high level query language • User and application centred perspective:
§ High expressive power § Queries easily represented in the interface § Uniform way of describing resources coming from different
sources (e.g. mash-ups) and of different kind (controlled vocabularies, ontologies, folksonomies, text mining data)
§ Simplified exchange of structured data between client and server in rich internet applications
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DIPARTIMENTO DI ELETTRONICA E INFORMAZIONE
FelisQL: a query
a publication and author: (an associate professor and affiliation: ‘Politecnico di Milano’)
at position: “first” or “second”, (a researcher and affiliation: (an university and country: not ‘Italy’))
Publications having as first or second author an associate professor from Politecnico di Milano, and as as additional author a researcher that is affilated to an university that is not in Italy
DIPARTIMENTO DI ELETTRONICA E INFORMAZIONE
The interface | 1 • Facet widgets allow to navigate and analyse items
according to a specific property (e.g. author) • Hyperlinks allow for query trasformations
§ Add new constraints (existential restrictions) on specific properties and (the facets)
§ Add alternatives on the existing filters • Focus: any sub-expression of the query
§ The point at which a new filter is “appended” à allows to build full-Boolean queries of arbitrary depth
§ A different point of view on the target of the exploration
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DIPARTIMENTO DI ELETTRONICA E INFORMAZIONE
The interface | 2
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DIPARTIMENTO DI ELETTRONICA E INFORMAZIONE
The interface | 3
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DIPARTIMENTO DI ELETTRONICA E INFORMAZIONE
Information visualization | 1
• Tag clouds and histograms to represent the relevance of facet values
• Possible measures of relevance § E.g. given the query a Publication and author: (an ‘Associate
Professor’ and the restriction subject: “exploratory interfaces” § Count: how may publications that are authored by an associate
professor have also “exploratory interfaces” as subject? § Recall: how many of those that have “exploratory interfaces” as
subject are also authored by an associate professor? § Other “custom measures”: e.g. average impact factor of
publications having “exploratory interfaces” as subject • Multi-dimensional views for query results: charts,
maps, etc. • Metrics for measuring “changes in explorations”
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DIPARTIMENTO DI ELETTRONICA E INFORMAZIONE
Information visualization | 2
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An interactive map of venues of archaeologic interest in Italy with location: “Northern Italy” selected
DIPARTIMENTO DI ELETTRONICA E INFORMAZIONE
Information visualization | 3
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Shift to location: “Southern Italy” the colors indicate the increase/decrease of relevance of ancient civilizations in this area w.r.t. to North
DIPARTIMENTO DI ELETTRONICA E INFORMAZIONE
Thank you for your kind attention! For questions and details, write me at [email protected]
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