Abstract

Data users are generally interested in two types of aggregated information: summarization of the selected attribute(s) for all considered entities and retrieval and evaluation of entities by the requirements posed on the relevant attributes. Less statistically literate users (e.g., domain experts) and the business intelligence strategic dashboards can benefit from linguistic summarization, i.e. a summary like most customers are middle-aged can be understood immediately. Evaluation of the mandatory and optional requirements of the structure P1 and most of the other posed predicates should be satisfied beneficial for analytical business intelligence dashboards and search engines in general. This work formalizes the integration of the aforementioned quantified summaries and quantified evaluation into the concept of database queries to empower their flexibility by, e.g., the nested quantified query conditions on hierarchical data structures. Later in our work, we adapted our research into practical application. We created a software environment for evaluating data based on a dataset retrieved from The Statistical Office of the Slovak republic. These datasets are aimed mainly on landscape characteristics like altitude, area sizes of towns and villages, and similar parameters. Based on user's preferences, our system recommends the most suitable place for holidays to spend on.

Highlights

  • Based on our previous research (Sojka et al, 2020), we decided to apply our work to the real world scenario described later in this paper

  • The same holds for interpreting the summaries where, despite the broad use of statistical functions, they are suitable for domain experts having a certain level of statistical literacy (Hudec et al, 2018)

  • This section studies linguistic summaries employed as aggregations of elementary requirements in the evaluation of entities

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Summary

Introduction

Based on our previous research (Sojka et al, 2020), we decided to apply our work to the real world scenario described later in this paper. Data users are interested in two types of queries, which might be expressed as vertical and horizontal aggregations (Rakovská and Hudec, 2019). The research questions in this work are the following: the problem of merging the horizontal and vertical aggregation and the formalization of mandatory and optional predicates in quantified queries, and a subsequent proposal of a suitable integration.

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