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Presentation on the Exposé demonstrator, to enable search of Dutch parliamentary proceedings (the Political Mashup data collection).
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Searching
Political Data by Strategy
Roberto CornacchiaJaap KampsWouter Alink
Arjen P. de Vries
Search by Strategy
An iterative 2-stage search process Express domain knowledge as high-level
search strategies Generate search engine from the strategy
A dynamic REST API UI controls for unspecified parameters
Separate search strategy definition (the how) from actual searching and browsing of data collections (the what)
https://devel.spinque.com/ExPoSeApp-20130116/?config=demo#dashboard/demo04:
/p/topic/Mokken
Search by Strategy captures:
Arbitrary retrieval unit types (not just documents) E.g., expert finding, entity search
“Semantic” search The building blocks operate on scored triples
Semi-structured search Data objects may be structured in hierarchies
Exploratory search Use facets as preferences
Exposé
Searching the parliamentary proceedings of the Dutch parliament Complete transcripts of everything said in
parliament Organized by parliamentary session Detailing who sais what in what role and
context
Exposé
Original data is PDF, transformed into XML by award-winning project Political Mashup http://politicalmashup.nl/
In Politics…
Essence is not only what is said, but also by who and to whom, and why
Concrete example: Wilders sais “knettergek” in parliament (in
2007) – is this remarkable?
“Knettergek” case
The word “knettergek” has been used many times in parliament…
… but never to address a member of the government
Vary
ing
resu
lt typ
es
Utterances
Person / Party / …
Flexibility
Concrete case: Maarten: “I cannot find Prof. Mokken, who I
know has been spoken about in parliament multiple times!”
Flexibility
Default indexing uses stemming and normalization
But… searching for people’s names (and, as we mention it, many other domain specific terminology) can be negatively affected by stemming
“Mokken” transformed into “mok”, leading us to geographic locations “Mook” and “De Mok”, but not to the famous professor!
https://devel.spinque.com/ExPoSeApp-20130116/?config=demo#dashboard/demo05:/p/topic/mokken/p/emphasis_stemming/0
Joins to the rescue!
Which house speakers from the Rotterdam harbour say what about “Amsterdam”?
biographies
describes
person
utterance
Sem
an
tic Search
Advantages
Define and execute custom build search strategies Specialized to the task, or even to the search
at hand
Search multiple data sources at once Explore and refine results interactively “Search provenance”
Complete transparency on how search results were obtained
Position Statement
Search professionals think in terms of search strategies already
Let them design their own strategies, and thereby tailor their search engines
So they learn to trust what we claim to be the effective information retrieval techniques!