在.Net中利用jena、pellet和SQL Server2005进行语义网编程

来源:互联网 发布:查手机真假软件 编辑:程序博客网 时间:2024/03/29 00:51

     用.net进行语义网编程时,有jena.net、OWL Library for .net、c# parser、RDF Library for .net等类库可以使用,但本人在使用这些类库时总是感觉不顺手,尤其在推理的时候很麻烦。

   在.net中利用jena操作本体(OWL),用SQL Server2005存储本体,用pellet进行本体推理配置如下(仅供参考,下列软件我只在这些版本中配置成功过):

  (1)、下载 Pellet 1.5.1, 解压后,新建文件夹,将目录lib下的文件copy至其中。pellet1.5.1中包括了jena2.5.4,所以不用重新下载jena。

  (2)、下载 IKVM 0.34.0.2 ,将bin目录中的文件copy至(1)的目录中。

  (3)、下载 Microsoft jdbc driver for SQL Server 1.1 (我用1.2版本没有配置成功过),将MS jdbc driver file文件夹中sqljdbc.jar copy至(1)的目录中。

  (4)、在pellet中新建一个bat文件,其代码如下:

               mkdir DotNet_Libraries
               mkdir pellet
               mkdir sqldriver
               move aterm-java-1.6.jar ./pellet
               move pellet.jar ./pellet
               move servlet.jar ./pellet
               move sqljdbc.jar ./sqldriver
               rem Convert Pellet 1.5.1 auxiliar libraries
               ikvmc ./xsdlib/*.jar -target:library -out:./DotNet_Libraries/xsdlib.dll -version:1.5.1.0 -nowarn:IKVMC0109
               ikvmc ./jetty/*.jar -target:library -out:./DotNet_Libraries/jetty.dll -version:1.5.1.0 -nowarn:IKVMC0109
               ikvmc ./junit/*.jar -target:library -out:./DotNet_Libraries/junit.dll -version:1.5.1.0 -nowarn:IKVMC0109
               ikvmc ./owlapi/*.jar -target:library -out:./DotNet_Libraries/owlapi.dll -version:1.5.1.0 -nowarn:IKVMC0109
               rem Convert Jena 2.5.4
               ikvmc ./jena/*.jar -target:library -out:./DotNet_Libraries/jena.dll -version:2.5.4.0 -nowarn:IKVMC0109
               rem Convert Pellet 1.5.1 libraries
               ikvmc ./pellet/*.jar -target:library -reference:./DotNet_Libraries/xsdlib.dll -reference:./DotNet_Libraries/jetty.dll -               reference:./DotNet_Libraries/junit.dll -reference:./DotNet_Libraries/owlapi.dll -reference:./DotNet_Libraries/jena.dll -               out:./DotNet_Libraries/pellet.dll -version:1.5.1.0 -nowarn:IKVMC0109
               rem Convert Microsoft jdbc SQL Driver 1.2
               ikvmc ./sqldriver/*.jar -target:library -out:./DotNet_Libraries/sqldriver.dll -version:1.2.0.0 -nowarn:IKVMC0109
               copy IKVM.GNU.Classpath.dll ./DotNet_Libraries/
               copy IKVM.Runtime.dll ./DotNet_Libraries/
               pause

   (5)、运行该bat文件。

   (6)、之后你就可以像操作普通的donet类库一样来引用jena和pellet了。

    OWL文件持久化操作主要代码如下:

...
using com.hp.hpl.jena.db;using com.hp.hpl.jena.rdf.model;using com.hp.hpl.jena.query;using ikvm.lang;using com.microsoft.sqlserver.jdbc;using System.Xml;   //在.net中操作OWL或RDF还是要引入xml库using System.Xml.XPath;
String M_DB_URL = "jdbc:microsft:sqlserver://" + dbserver + ";databaseName=" + db; // database URLString M_DB_USER = dbuser;     // database user idString M_DB_PASSWD = dbpass;   // database user passwordString M_DB = "MsSQL";  // database engine
M_DB_URL = "jdbc:sqlserver://" + dbserver + ";databaseName=" + db;java.lang.Class.forName(typeof(com.microsoft.sqlserver.jdbc.SQLServerDriver).FullName);connRDB = new DBConnection(M_DB_URL, M_DB_USER, M_DB_PASSWD, M_DB);ModelMaker mkModel = ModelFactory.createModelRDBMaker(connRDB);modelRDF = mkModel.createModel(modelName);modelRDF = mkModel.openModel(modelName);…
使用pellet服务的主要代码如下:
...
using ikvm.io;using org.mindswap;using org.mindswap.pellet;using org.mindswap.pellet.jena;using com.hp.hpl.jena.ontology;using com.hp.hpl.jena.rdf.model;using com.hp.hpl.jena.reasoner;
...
PelletOptions.USE_COMPLETION_QUEUE = true;PelletOptions.USE_SMART_RESTORE = false;          string strResult = "";java.io.InputStream fstreamOntologyBase = null;java.io.InputStream fstreamOntology = null;OntModel omGeoConcepts = null;PelletInfGraph pinfgraphGeoConcepts = null;string strOntologyPathBase = "";
...
strOntologyPath = "C://SemWeb//GeoConceps_V1.0_20080117.owl";strOntologyPathBase = "C://SemWeb//geo_2007.owl"
...
omGeoConcepts = ModelFactory.createOntologyModel(PelletReasonerFactory.THE_SPEC);omGeoConcepts.setStrictMode(false);fstreamOntologyBase = new java.io.FileInputStream(strOntologyPathBase);omGeoConcepts.read(fstreamOntologyBase, "");fstreamOntology = new java.io.FileInputStream(strOntologyPath);omGeoConcepts.read(fstreamOntology, "");pinfgraphGeoConcepts = (PelletInfGraph)omGeoConcepts.getGraph();DateTime dtimeIni = DateTime.Now;bool bIsConsistent = pinfgraphGeoConcepts.isConsistent();DateTime dtimeFin = DateTime.Now;TimeSpan tspanExecTime = dtimeFin - dtimeIni;strResult = "Is consistent: " + bIsConsistent.ToString() +                    "/nExecution time: " + tspanExecTime.TotalSeconds.ToString() + "seconds";
...
 
当然您也可以用LINQ来操作RDF,把语义网中的OWL当作RDF来使用.(虽然RDF是语义网中MetaData层的资源表述框架,而 
OWL应该是Ontology层的概念。 RDF着重于对数据的描述,而OWL则侧重于逻辑推理的准备。 )
第一次用Live Writer来写的博客,可能有些地方排版不好,请列位看官谅解。
 
原创粉丝点击