Results 101 to 110 of about 24,802 (228)

Distributed Processing of Generalized Graph-Pattern Queries in SPARQL 1.1 [PDF]

, 2016
We propose an efficient and scalable architecture for processing generalized graph-pattern queries as they are specified by the current W3C recommendation of the SPARQL 1.1 "Query Language" component.
Gurajada, Sairam, Theobald, Martin
core   +1 more source

Pengines: Web Logic Programming Made Easy

, 2014
When developing a (web) interface for a deductive database, functionality required by the client is provided by means of HTTP handlers that wrap the logical data access predicates.
Lager, Torbjörn, Wielemaker, Jan
core   +2 more sources

Impact of Land Use Change and Drought on the Net Emissions of Carbon Dioxide and Methane From Tropical Peatlands in Southeast Asia

AGU Advances, Volume 6, Issue 6, December 2025.
Abstract Peat decomposition is progressing in Southeast Asia due to lowered groundwater levels (GWL) caused by drainage. Additionally, droughts during El Niño events significantly lower the GWL, the main environmental factor that controls greenhouse gas (GHG; carbon dioxide (CO2) and methane) emissions in peatlands.
Takashi Hirano, Tomohiro Shiraishi, Ryuichi Hirata, Masato Hayashi, Chandra Shekhar Deshmukh, Lulie Melling, Bettycopa Amit, Masayuki Itoh, Tomomichi Kato, Frankie Kiew, Sofyan Kurnianto, Kitso Kusin, Nardi Nardi, Nurholis Nurholis, Tiara Nales Nyawai, Elisa Rumpang, Ayaka Sakabe, Ari Putra Susanto, Joseph Wenceslaus Waili, Guan Xhuan Wong   +19 more
wiley   +1 more source

View Selection in Semantic Web Databases [PDF]

, 2011
We consider the setting of a Semantic Web database, containing both explicit data encoded in RDF triples, and implicit data, implied by the RDF semantics. Based on a query workload, we address the problem of selecting a set of views to be materialized in
François Goasdoué, François Goasdoué, Ioana Manolescu, Julien Leblay, Julien Leblay, Konstantinos Karanasos, Konstantinos Karanasos, Équipes-projets Leo   +7 more
core   +10 more sources

Context-Free Path Queries on RDF Graphs

, 2016
Navigational graph queries are an important class of queries that canextract implicit binary relations over the nodes of input graphs. Most of the navigational query languages used in the RDF community, e.g.
A Hogan, A Polleres, EV Kostylev, F Alkhateeb, F Alkhateeb, GHL Fletcher, J Hayes, J Hopcroft, J Pérez, J Pérez, K Losemann, KJ Kochut, M Arenas, M Lange, M Marx, P Linz, P Sevon, R Angles, S Abiteboul, S Abiteboul, S Bischof, X Zhang, X Zhang   +22 more
core   +1 more source

An introduction to Graph Data Management

, 2017
A graph database is a database where the data structures for the schema and/or instances are modeled as a (labeled)(directed) graph or generalizations of it, and where querying is expressed by graph-oriented operations and type constructors.
A Dries, A Gutiérrez, A Iosup, A Morari, A Poulovassilis, AD Zhu, AO Mendelzon, B Amann, B Elser, C Berge, C Vicknair, C Watters, C Weiss, CS Chang, D Conte, D Dominguez-Sal, D Theodoratos, DC Faye, DW Shipman, EF Codd, FW Tompa, G Malewicz, GM Kuper, H He, HS Kunii, IF Cruz, IF Cruz, J Hidders, J Paredaens, J Peckham, J. Hidders, Jonathan Hayes, K Zeng, L Kowalik, L Zou, M Atre, M Ciglan, M Consens, M Gemis, M Gyssens, M Han, M Levene, M Levene, M Levene, M Mainguenaud, M Schmidt, M Yannakakis, MA Bornea, MA Rodriguez, MA Rodriguez, Marc Andries, MP Consens, MP Consens, N Kiesel, N Roussopoulos, O Erling, P Barceló Baeza, P Buneman, P Yuan, Philippe Cudré-Mauroux, PPS Chen, PT Wood, PT Wood, R Agrawal, R Angles, R Angles, R Brijder, R Ronen, RH Güting, RS Xin, S Abiteboul, S Abiteboul, T Neumann, W Fan, W Kim, Y Guo, Y Low, Y Papakonstantinou, Y Tian, Y Zhao, YA Liu   +80 more
core   +1 more source

Reverse OTTR: A query language for RDF

, 2022
Reasonable Ontology Templates (OTTR) is a recent template language for the modelling -and construction- of RDF knowledge graphs, which aims to tackle the issue that RDF itself is too low level for practical use. By emphasising useful design-principles, such as abstraction levels and the "Don't Repeat Yourself''-principle (DRY), OTTR is a promising ...
openaire   +1 more source

Europeana Creative. EDM Endpoint. Custom Views

Digital Presentation and Preservation of Cultural and Scientific Heritage, 2013
The paper discusses the Europeana Creative project which aims to facilitate re-use of cultural heritage metadata and content by the creative industries. The paper focuses on the contribution of Ontotext to the project activities. The Europeana Data Model
Nikola Ikonomov, Boyan Simeonov, Jana Parvanova, Vladimir Alexiev   +3 more
doaj   +1 more source

Design and implementation of a filter engine for semantic web documents [PDF]

, 2005
This report describes our project that addresses the challenge of changes in the semantic web. Some studies have already been done for the so-called adaptive semantic web, such as applying inferring rules.
Hinze, Annika, Kozuka, Takanori
core   +1 more source

Secure Access Control in Semantic Web-Based E-Government Systems

Syrian Journal for Science and Innovation
The rapid growth of semantic web technologies has led to their widespread adoption in e-government applications, addressing challenges related to administrative heterogeneity.
Sary Jouhara, Mohamad Aljnidi
doaj   +1 more source