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--  『 Semantic Web(语义Web)/描述逻辑/本体 』  (http://bbs.xml.org.cn/list.asp?boardid=2)
----  请教一个jena的查询出所有数据的语法  (http://bbs.xml.org.cn/dispbbs.asp?boardid=2&rootid=&id=91788)

--  作者：allen2006cyb@126.com
--  发布时间：7/9/2011 5:08:00 PM

--  请教一个jena的查询出所有数据的语法
自己构造了个超级简单的本体，就一个class，下面有5个属性。
从网上找了个查询出单个对象的所有数据，机器上运行的很正常，能够把对象C-000301的所有列提取出来，语法如下：
String prefix = "PREFIX owl: <http://www.w3.org/2002/07/owl#>"+
                     "PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>"+
                     "PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> " +
                     "PREFIX  base:<http://www.owl-ontologies.com/Ontology1310193754.owl#> ";
     
     String k="base:C-000301 ";
     //String select =  "SELECT ?dormitory ?major ?sex ?age ?attend ";
     String select =  "SELECT * ";
     
     String where =  "WHERE { "+
           "OPTIONAL { "+ k +
                                " base:caseName ?caseName ."+
                       " }"+
                       "OPTIONAL { "+ k +
                                " base:caseDescription ?caseDescription ."+
                       " }"+
                       "OPTIONAL { "+ k +
                                " base:caseConsignor ?caseConsignor ."+
                       " }"+
                       "OPTIONAL { "+ k +
                                " base:caseTime ?caseTime ."+
                       " }"+  
                       "OPTIONAL { "+ k +
                            " base:caseDetail ?caseDetail ."+
                       " }"+   
                      " }";

现在我的owl里面有5个对象，全部提取出来的语法怎么写呢，类似sql里面select * from case的语句？
谢谢各位了！！

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