We present Snap-SPARQL, which is a Java framework for working with SPARQL and OWL. The framework includes a parser, axiom template API, SPARQL algebra implementation, and graphical user interface components for reading, processing and executing SPARQL queries under the SPARQL 1.1 OWL Entailment Regime. While the framework was originally designed to support the implementation of a SPARQL teachin...

SPARQL is becoming an important query language for RDF data. Query optimization to speed up query processing has been an important research topic for all query languages. In order to optimize SPARQL queries, we suggest a core fragment of the SPARQL language, which we call the coreSPARQL language. coreSPARQL has the same expressive power as SPARQL, but eliminates redundant language constructs of...

The volume of RDF data is now growing tremendously. It is thus considered prudent to store and process massive RDF data with distributed SPARQL engines instead of relying on a singlemachine system.Many sophisticated index and partitioning schemes have also been proposed to support SPARQL query evaluations. However, existing SPARQL engines have mainly followed oneat-a-time scheme so that query e...

هدف: کبد از حساس‌ترین بافت‌های هدف فشار اکسایشی ناشی تمرین می‌باشد و آمینوترانسفراز‌های کبدی، شاخص‌های حساسی برای تعیین آسیب دیدگی سلول‌های کبدی هستند. پژوهش حاضر با مقایسه تأثیر هشت هفته TRX مقاومتی سنتی بر برخی آنزیم‌های (آسپارتات آمینو ترانسفراز آلانین ترانسفراز) در زنان غیرفعال انجام گرفت.روش ­ها: این که به روش نیمه تجربی شد، 28 دختر میانگین سن41/1±07/21 سال شاخص توده بدن 25/4±52/22 کیلوگرم...

Web Ontology Language (OWL) [5] can be seen as an extension of Resource Description Framework (RDF). The primary exchange syntax for OWL is RDF/XML, and every OWL ontology can be represented as an RDF graph. But there is no standard query language specifically for OWL ontologies. The most commonly used Semantic Web query language is SPARQL [7], which is intended to be used for RDF. Roughly spea...

In this paper, we present LSQ – a Linked Dataset describing SPARQL queries extracted from the logs of four prominent public SPARQL endpoints. We argue that this dataset has a variety of uses for the SPARQL research community, be it to generate custom benchmarks, conduct analyses of SPARQL adoption, see how agents interact with endpoints, find queries mentioning a resource, etc. We first motivat...

While XPath is an established query language developed by the W3C for XML, SPARQL is a new query language developed by the W3C for RDF data. Comparisons between the data models of XML and RDF and between the query languages XPath and SPARQL are missing. Since XML and XPath are earlier recommendations of the W3C than RDF and SPARQL, currently more XML data and XPath queries are used in applicati...