Triple Pattern Fragments: A low-cost knowledge graph interface for the Web
| Autor: | Olaf Hartig, Joachim Van Herwegen, Pieter Colpaert, Laurens De Vocht, Ruben Verborgh, Ben De Meester, Miel Vander Sande, Gerald Haesendonck |
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| Rok vydání: | 2016 |
| Předmět: |
Technology and Engineering
querying Computer Networks and Communications Computer science Interface (Java) Reliability (computer networking) 02 engineering and technology computer.software_genre SPARQL 01 natural sciences World Wide Web Linked Data Fragments 020204 information systems Server 0202 electrical engineering electronic engineering information engineering Web application RDF Database business.industry 010401 analytical chemistry computer.file_format Linked data 0104 chemical sciences Human-Computer Interaction Linked Data High availability business computer Software |
| Zdroj: | JOURNAL OF WEB SEMANTICS |
| ISSN: | 1570-8268 |
| DOI: | 10.1016/j.websem.2016.03.003 |
| Popis: | Billions of Linked Data triples exist in thousands of RDF knowledge graphs on the Web, but few of those graphs can be queried live from Web applications. Only a limited number of knowledge graphs are available in a queryable interface, and existing interfaces can be expensive to host at high availability. To mitigate this shortage of live queryable Linked Data, we designed a low-cost Triple Pattern Fragments interface for servers, and a client-side algorithm that evaluates SPARQL queries against this interface. This article describes the Linked Data Fragments framework to analyze Web interfaces to Linked Data and uses this framework as a basis to define Triple Pattern Fragments. We describe client-side querying for single knowledge graphs and federations thereof. Our evaluation verifies that this technique reduces server load and increases caching effectiveness, which leads to lower costs to maintain high server availability. These benefits come at the expense of increased bandwidth and slower, but more stable query execution times. These results substantiate the claim that lightweight interfaces can lower the cost for knowledge publishers compared to more expressive endpoints, while enabling applications to query the publishers’ data with the necessary reliability. |
| Databáze: | OpenAIRE |
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