[DL-Learner SVN] SF.net SVN: dl-learner:[1469] trunk/src/dbpedia-navigator

[<sk...@us...>]

Revision: 1469
          http://dl-learner.svn.sourceforge.net/dl-learner/?rev=1469&view=rev
Author:   sknappe
Date:     2008-10-28 10:10:34 +0000 (Tue, 28 Oct 2008)

Log Message:
-----------
new negativeExampleFinder using database

Modified Paths:
--------------
    trunk/src/dbpedia-navigator/DLLearnerConnection.php
    trunk/src/dbpedia-navigator/helper_functions.php

Modified: trunk/src/dbpedia-navigator/DLLearnerConnection.php
===================================================================
--- trunk/src/dbpedia-navigator/DLLearnerConnection.php	2008-10-28 09:18:33 UTC (rev 1468)
+++ trunk/src/dbpedia-navigator/DLLearnerConnection.php	2008-10-28 10:10:34 UTC (rev 1469)
@@ -53,6 +53,7 @@
 	function getConceptFromExamples($posExamples,$negExamples,$number)
 	{
 		require_once("Settings.php");
+		require_once("helper_functions.php");
 		$settings=new Settings();
 		
 		$this->client->applyConfigEntryInt($this->id, $this->ksID, "recursionDepth",1);
@@ -61,10 +62,11 @@
 		$this->client->applyConfigEntryString($this->id, $this->ksID, "predefinedManipulator", "DBPEDIA-NAVIGATOR");
 		$this->client->applyConfigEntryBoolean($this->id, $this->ksID, "useCache", true);
 		if(empty($negExamples)){
-			if ($settings->classSystem=="YAGO") $filterClasses=array("http://xmlns.com/foaf/","http://dbpedia.org/ontology/");
+			/*if ($settings->classSystem=="YAGO") $filterClasses=array("http://xmlns.com/foaf/","http://dbpedia.org/ontology/");
 			else if ($settings->classSystem=="DBpedia") $filterClasses=array("http://xmlns.com/foaf/","http://dbpedia.org/class/yago/","http://dbpedia.org/ontology/Resource");
 			$negExamples=$this->client->getNegativeExamples($this->id,$this->ksID,$posExamples,count($posExamples),"http://dbpedia.org/resource/",$filterClasses);
-			$negExamples=$negExamples->item;
+			$negExamples=$negExamples->item;*/
+			$negExamples=getNegativeExamplesFromParallelClass($posExamples);
 		}
 		$this->client->applyConfigEntryStringArray($this->id, $this->ksID, "instances", array_merge($posExamples,$negExamples));
 		$this->client->setReasoner($this->id, "fastInstanceChecker");

Modified: trunk/src/dbpedia-navigator/helper_functions.php
===================================================================
--- trunk/src/dbpedia-navigator/helper_functions.php	2008-10-28 09:18:33 UTC (rev 1468)
+++ trunk/src/dbpedia-navigator/helper_functions.php	2008-10-28 10:10:34 UTC (rev 1469)
@@ -616,4 +616,51 @@
 			if (isset($triples['http://dbpedia.org/property/utcDst'])) unset($triples['http://dbpedia.org/property/utcDst']);
 			if (isset($triples['http://dbpedia.org/property/spokenWikipedia2Property'])) unset($triples['http://dbpedia.org/property/spokenWikipedia2Property']);
 }
+
+public function getNegativeExamplesFromParallelClass($posExamples){
+	include_once('Settings.php');
+	include_once('DatabaseConnection.php');
+	//connect to the database
+	$settings=new Settings();
+	$databaseConnection=new DatabaseConnection($settings->database_type);
+	$databaseConnection->connect($settings->database_server,$settings->database_user,$settings->database_pass);
+	$databaseConnection->select_database($settings->database_name);
+	
+	$examples=array();
+	foreach ($posExamples as $pos){
+		$query="SELECT category FROM articlecategories WHERE name='".$pos."' AND category!='http://dbpedia.org/ontology/Resource'";
+		$res=$databaseConnection->query($query);
+		if ($databaseConnection->numberOfEntries($res)>0) $zufall = rand(1,$databaseConnection->numberOfEntries($res));
+		$i=1;
+		while ($result=$databaseConnection->nextEntry($res)){
+			if ($i==$zufall) $class=$result['category'];
+			$i++;
+		}
+		$query="SELECT father FROM classhierarchy WHERE child='".$class."'";
+		$res=$databaseConnection->query($query);
+		if ($databaseConnection->numberOfEntries($res)>0) $zufall = rand(1,$databaseConnection->numberOfEntries($res));
+		$i=1;
+		while ($result=$databaseConnection->nextEntry($res)){
+			if ($i==$zufall) $father=$result['father'];
+			$i++;
+		}	
+		
+		$query="SELECT child FROM classhierarchy WHERE father='".$father."' AND child!='".$class."'";
+		$res=$databaseConnection->query($query);
+		if ($databaseConnection->numberOfEntries($res)>0) $zufall = rand(1,$databaseConnection->numberOfEntries($res));
+		$i=1;
+		while ($result=$databaseConnection->nextEntry($res)){
+			if ($i==$zufall) $child=$result['child'];
+			$i++;
+		}
+		$query="SELECT name FROM articlecategories WHERE category='".$child."' AND name!='".$pos."' ORDER BY RAND() LIMIT 1";
+		$res=$databaseConnection->query($query);
+		if ($databaseConnection->numberOfEntries($res)>0){
+			$result=$databaseConnection->nextEntry($res);
+			$examples[]=$result['name'];
+		}	
+	}
+	
+	return $examples;
+}
 ?>
\ No newline at end of file


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