楼主

[求助]Pellet如何放進去 想請問大大 小弟想把Pellet 推論機放進去這部份程式裡 然後推論出來 把推出來結果儲存起來 該如何寫呢?? try{             FileInputStream file=new FileInputStream("PeriodicTable.owl");             InputStreamReader in=new InputStreamReader(file,"UTF-8");             Model tempModel =ModelFactory.createDefaultModel();             tempModel.read(in,null);             String qureyString=                "PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> "+                 "PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>"+                 "PREFIX table:<http://www.daml.org/2003/01/periodictable/PeriodicTable#>"+                                 "SELECT *"+                 "WHERE{"+                 "table:group_17   ?p  table:I ." +                 "}";             Query query =QueryFactory.create(querytString);             QueryExecution qe=QueryExecutionFactory.create(query,tempModel);             ResultSet results=qe.execSelect();                                       ResultSetFormatter.out(System.out,results,query);                      qe.close();         }catch(IOException e){             e.printStackTrace();         } } PeriodicTable.owl: http://www.daml.org/2003/01/periodictable/PeriodicTable.owl    收藏   分享   顶(0)

	第2楼

存到哪里？

	第3楼

想覆蓋原來的PeriodicTable.owl檔或儲存依個新的檔 ,因為目前小弟在做SPARQL的查詢 想經過Pellet 去推論 原本a是b的subclass  b是c的subclass   ===>推論出  a是c的subclass  把它存起來  這樣用SPARQL 也可以查出a也是c的subclass

	第4楼

推理的用法请看这里： http://jena.sourceforge.net/how-to/dig-reasoner.html 覆盖原来的owl可以使用OntModel的下面两个方法： writeAll Model writeAll(java.io.Writer writer,                java.lang.String lang,                java.lang.String base)Write a serialized represention of all of the contents of the model, including inferred statements and statements imported from other documents. To write only the data asserted in the base model, use write. It is often better to use an OutputStream rather than a Writer, since this will avoid character encoding errors. The language in which to write the model is specified by the lang argument. Predefined values are "RDF/XML", "RDF/XML-ABBREV", "N-TRIPLE" and "N3". The default value, represented by null, is "RDF/XML". Parameters: writer - The output writer base - The base uri for relative URI calculations. null means use only absolute URI's. lang - The language in which the RDF should be written Returns: This model -------------------------------------------------------------------------------- writeAll Model writeAll(java.io.OutputStream out,                java.lang.String lang,                java.lang.String base)Write a serialized represention of all of the contents of the model, including inferred statements and statements imported from other documents. To write only the data asserted in the base model, use write. The language in which to write the model is specified by the lang argument. Predefined values are "RDF/XML", "RDF/XML-ABBREV", "N-TRIPLE" and "N3". The default value, represented by null, is "RDF/XML". Parameters: out - The output stream to which the RDF is written base - The base uri to use when writing relative URI's. null means use only absolute URI's. lang - The language in which the RDF should be written Returns: This model

	第5楼

謝謝大大回答.... 小弟想在問一個問題?? 假如 a是b的subclass  b是c的subclass 那c後面所有subclass 是 a,b (不用任何推論器情況下,也不用在存檔或覆蓋) jena OWL  可以直接抓c後面所有subclass : a,b 一次print出來嗎?? 可以的話 , 要用什麼API 程式碼??

	第6楼

不用推理机光靠编程是很难做的，即使编出来，也许效率并不高