Apache Jena 3.1.0 发布了，Jena是一个Java工具箱用于开发基于RDF与OWL语义(semantic)Web应用程序。它提供了一个RDF API；ARP，一个RDF解析器；SPARQL，W3C RDF查询语言；一个OWL API；和基于规则的RDFS与OWL接口。 改进记录如下： * In-memory transactional dataset contributed by Adam Soroka with thanks to the University of Virginia Library for providing the time for Adam to work on this. * SPARQL extension for CONSTRUCT Quads (RC) contributed by Qihong Lin with thanks to the Google Summer of Code scheme for sponsoring Qihong on this project. * New custom functions and aggregate functions Added: + afn:sprintf (contribution from Alessandro Seganti) + The XQuery/XPath Functions and Operators "math:" functions + Custom aggregates for stdev etc. (also STDEV etc as keywords). * Logging - log4j marked <optional> * Fuseki: Allow multiple service per file, shared datasets * OSGi fixes (Jaroslav Pullmann) * Consistent support for transactions in DatasetGraphs * New module jena-cmds * JSON result type fix: "literal" not "type": "typed-literal" * Space saving when parsing (FactoryRDF) Parsing RDF now saves space by partial interning RDFTerms created during a each parser run. * Improvements to jena-text to include more text query parsers (Osma Suominen) 下载地址：http://jena.apache.org/download/ Apache Jena 3.1.0 发布下载地址
