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Web Interface for Managing RDF Data Sets
Kiss, Tomáš ; Rychlý, Marek (referee) ; Burget, Radek (advisor)
The main aim of this thesis is to provide information about RDF data model. Theoretical part of the thesis represents possible ways of storing RDF data, existing RDF storages and SPARQL query language. Furthermore, there is a brief representation of tools used for creation of client web applications with main focus on the Vue.js framework. Acquired knowledge is used to implement web interface enabling browsing of RDF storage and interactive creation of SPARQL queries.
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Web Editor for SPARQL
Paulovič, Daniel ; Hynek, Jiří (referee) ; Burget, Radek (advisor)
Target of this thesis is to create web editor for query language SPARQL as component in javascript framework Vue.js and web application using this component to query over SPARQL endpoints. To implement editor were used CodeMirror library and PrimeVue library for user interface. Final version of component is publicly available as npm package. Benefit of this thesis is easily importable editor with many functions to simplify writing queries.
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Web Interface for RDF Storage Browsing
Tomov, Patrik ; Hynek, Jiří (referee) ; Burget, Radek (advisor)
The aim of this thesis is to create a web interface for browsing the RDF storage, where the user will be able to manipulate its content. Within the storage, he will be able to create and delete repositories, add and delete repository content, view and interact with repository content, and also perform SPARQL queries within the repository. The client part of the application is written in Javascript using the Vue framework. The RDF4J server, which is deployed on the Apache Tomcat service, is used for the server part. Communication between the server and the client is secured using the RDF4J REST API. The resulting application allows to interactively and easily browse the content of the RDF storage.
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Querying RDF graphs stored in a relational database using SPARQL and R2RML
Chaloupka, Miloš ; Nečaský, Martin (advisor) ; Kopecký, Michal (referee)
The RDF framework is becoming a popular framework for presenting data. It makes the data easily accessible and queryable. But the most common way how to store structured data is to use a relational database systems. The relational databases benefit from their long theoretical and practical history, however the relational database does not offer any convenient way how to publish the data. It is essential to create a mapping between these two worlds, to publish the data stored in a relational database in the RDF format. In the presented work we study the SPARQL algebra and create a transformation algorithm that enable us to create a virtual SPARQL endpoint over the relational data. We apply the acquired knowledge in implementation of a tool which uses the algorithm to proof the concept. Powered by TCPDF (www.tcpdf.org)
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Towards Efficient Parallel Data Processing on Modern Hardware
Falt, Zbyněk ; Yaghob, Jakub (advisor) ; Smrž, Pavel (referee) ; Benkner, Siegfried (referee)
Parallel data processing is a very hot topic in current research, since the amount of data and the complexity of the operations performed on them has been increasing significantly in the past few years. In this thesis, we focus on a specific domain of this research -- the design and implementation of parallel algorithms used mainly in database systems. First, we introduce important enhancements in the Bobox system, which is a framework for the development of parallel data processing applications. Then, we introduce a new domain specific language called Bobolang which makes the implementation of those applications easier. Next, we propose parallel and scalable algorithms used in the domain of databases, namely sort and merge join, and introduce their efficient implementation using the combination of Bobox and Bobolang. Finally, we introduce parallel runtime for SPARQL engine as an example of a parallel data processing application which demonstrates the main contributions of this thesis in complex and real-life situations. Powered by TCPDF (www.tcpdf.org)
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SPARQL compiler for Bobox
Čermák, Miroslav
The goal of the work is to design and implement a SPARQL compiler for the Bobox system. In addition to lexical and syntactic analysis corresponding to W3C standard for SPARQL language, it performs semantic analysis and optimization of queries. Compiler will constuct an appropriate model for execution in Bobox, that depends on the physical database schema.
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Web Interface for a Database of Events
Hanzlík, Tomáš ; Křivka, Zbyněk (referee) ; Burget, Radek (advisor)
This work includes the design and implementation of a web application that serves as an interface between users and data aggregated from social networks. In the web interface, an emphasis is placed on displaying large amounts of data and browsing through filters. It consists of the JavaScript client part written in Vue.js and Nuxt.js and the server part of the Django REST framework that serves as a data source.
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Querying RDF data in Multi-Model NoSQL databases
Cutajar, Marzia ; Svoboda, Martin (advisor) ; Klímek, Jakub (referee)
The RDF framework has gained popularity in recent years, as it makes semantic data easily accessible and queryable on the Web. However, RDF data management systems are facing certain challenges, particularly that of scalability. NoSQL databases, which are known for their ability to store large amounts of unstructured data, could be exploited for this purpose to gain more efficient systems. Even more interesting would be the use of Multi-Model NoSQL databases, which incorporate several different data models within a single database management system, and were created as a response to Polyglot Persistence and its challenges. As of yet, semantic data is not well supported in such database systems. In this thesis, we present approaches for transforming and storing RDF data within the Multi-Model database ArangoDB, as well as propose a query transformation algorithm that enables us to query RDF data in ArangoDB using SPARQL. The functionality of these data transformation and query transformation algorithms is experimentally evaluated on sample data and queries, using our prototype implementation.
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Tool for RDF geodata visualization on a map
Rous, Daniel ; Nečaský, Martin (advisor) ; Škoda, Petr (referee)
The goal of this thesis is to design, implement and test a web application, which will visualize RDF data in a heat map. The heat will be defined by the user's metric data se- lection. The application will simplify user's selection needed for visualization by automatic detection of metric and location data in loaded schema. User will have an opportunity to filter data by some data properties. The application will be tested on two different data sources. One of them will be Central register of grants (IS CEDR III). The other one will be the agenda dataset from Rights and Duties Register (RPP). 1
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Secure Semantically-Based Discovery of Resources in RESTful Architecutre
Koudelka, Jiří ; Burget, Radek (referee) ; Rychlý, Marek (advisor)
This thesis looks into the problematics of secure semantically-based discovery of resources in REST-ful architecture. The subject of this thesis is the implementation and potential extension of the mRDP for secure discovery of resources in REST-ful architecture, including the implementation of a corresponding open-source library compatible with the Android operating system. Another topic of this thesis is the implementation of simple example applications using this library.
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