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Identifier	000419275
Title	Facetize: an interactive tool for cleaning and transforming datasets for facilitating their exploration
Alternative Title	Facetize: ένα διαλογικό εργαλείο για τον καθαρισμό και το μετασχηματισμό συνόλων δεδομένων για τη διευκόλυνση της εξερεύνησής τους
Author	Κοκολάκη, Άννα Τ.
Thesis advisor	Τζίτζικας, Γιάννης
Reviewer	Πλεξουσάκης, Δημήτρης Φλουρής, Γιώργος
Abstract	There is a plethora of datasets in various formats which are usually stored in files, hosted in data catalogs or accessed through SPARQL endpoints. In most cases, these datasets cannot be straightforwardly explored by end users. To fill this gap, in this thesis we present the design and implementation of Facetize, an editor that allows plain users with no particular technical background, to transform datasets, either static (i.e. stored in files), or dynamic (i.e. being the results of SPARQL queries), to datasets that can be directly explored effectively by themselves or other users. The latter is achieved through the familiar interaction paradigm of Faceted Search (and Preference-enriched Faceted Search). We describe the requirements, we introduce the required set of transformations, and then we detail the functionality and the implementation of the editor Facetize that realizes these transformations. The supported operations cover a wide range of tasks (selection, visibility, deletions, edits, definition of hierarchies, intervals, derived attributes, and others). In this way Facetize enables the user to carry them out in a user-friendly and guided manner, without presupposing any technical background (regarding data representation or query languages). Finally we present the results of task-based evaluation with users which was quite positive.
Language	English
Subject	Data cleansing
	Data transformation
Issue date	2018-11-23
Collection	School/Department--School of Sciences and Engineering--Department of Computer Science--Post-graduate theses
	Type of Work--Post-graduate theses
Permanent Link	https://elocus.lib.uoc.gr//dlib/2/f/6/metadata-dlib-1542362872-801250-12960.tkl
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