Search Results for "sparql query"

Jena is Java toolkit for developing semantic web applications based on W3C recommendations for RDF and OWL. It provides an RDF API; ARP, an RDF parser; SPARQL, the W3C RDF query language; an OWL API; and rule-based inference for RDFS and OWL. Jena is now an Apache project: http://jena.apache.org/

SPARQL Query Benchmarker is a simple to use tool (and API) for running any benchmark/testing you want to create against any HTTP accessible SPARQL system.

...It is succeeded by the Eclipse RDF4J project, which can be found at GitHub and at http://www.rdf4j.org/. Sesame is a de-facto standard framework for processing RDF data. This includes parsing, scalable storage, reasoning and full SPARQL 1.1 query/update support. Sesame offers a fully modular toolkit and an easy-to-use Java API that can be connected to all leading RDF storage solutions.

CliqueSquare is a system for storing and querying large RDF graphs relying on Hadoop’s distributed file system (HDFS) and Hadoop’s MapReduce open-source implementation. It provides a novel partitioning and storage scheme that permits 1-level joins to be evaluated locally using efficient map-only joins. In addition, CliqueSquare is equipped with a unique optimization algorithm based on graphs and cliques capable of generating highly parallelizable flat query plans relying on n-ary equality joins.

SPARQL, a declarative query language for querying RDF-graphs, supports retrieval of data exclusively based on facts; in contrast Recommender Systems aim to predict the taste of a user towards a set of not consumed items. However, predictions or suggestions are entities that cannot be explicitly retrieved. ReSPARQL is an extension of SPARQL that fills the gap between this two paradigms and enables a generic and flexible approach for recommendations over arbitrary RDF-graphs. ...

...The goal is to provide reasoning support for all major Semantic Web reasoning standards, including RDF(S), OWL 2 (Direct Semantics, RDF-Based Semantics, OWL 2 RL/RDF rules), SWRL, RIF (RIF BLD, RIF Core, RIF+RDF and RIF+OWL combinations), and Common Logic. Available reasoning methods are entailment checking, consistency checking and query answering in the form of SPARQL entailment regimes. Internally, Swertia does not provide any reasoning capabilities itself but provides all necessary means to enable the use of existing reasoners to perform reasoning in the supported Semantic Web standards. The majority of FOL reasoners is supported, as well as Semantic Web reasoners for the building hybrid reasoning systems.

SemaRule Navigator is an Integrated Suite of Open-Source and Free-License Software, placing Semantic and Text Analysis Technologies in the toolbox of Researchers, Students, and Enterprises.

it enable any domain's expert to create/modify an ontology for this domain. This application provides a lot of features such as creating or editing ontology, running query on ontology using SPARQL, visualization ... etc.

DB2RDF is a a software tool that will convert data from relational data model to semantic data model (in the form of RDF and RDFS). A SPARQL endpoint for querying the converted data. For querying the semantic data, SPARQL query language is used.

Federated SPARQL queries: Answer one SPARQL query using multiple SPARQL endpoints.

SPARQLViz is a plugin for IsaViz which provides the user with a SPARQL query interface. SPARQLViz is capable of creating (throug a wizard), validating and executing SPARQL queries. The result is visualized with respect to the original dataset.

An implementation (parser/interpreter) of SPARQL, a query language for RDF data that is the current recommendation of the W3C. Allows easy cusomization of the language and plugs in to several popular RDF servers, like Sesame.

RDQuery is a wrapper system, which enables Semantic Web applications to access and query data actually stored in relational databases using their own built-in functionality. RDQuery automatically translates SPARQL and RDQL queries into SQL.

Tuqs is a SAIL implementation based on Lucene. It uses sophisticated QueryEvaluation improvements and makes it possible to use Lucene QuerySyntax in SPARQL queries. It is optimized for super fast fulltext lookups in datasets that are close to being not searchable with other RDF Stores.

a tool-kit for creating "web 2.5 generation", include several useful stuff to work with semantic web (otology editor, gui for sparql query, ontology components...) and design RIAs's gui visually (html + ajax based apps, flash based apps,...)