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		<id>http://wandora.org/w/index.php?action=history&amp;feed=atom&amp;title=Null_%28query_directive%29</id>
		<title>Null (query directive) - Revision history</title>
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		<updated>2026-04-18T12:51:29Z</updated>
		<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>http://wandora.org/w/index.php?title=Null_(query_directive)&amp;diff=6981&amp;oldid=prev</id>
		<title>Olli at 10:22, 25 August 2009</title>
		<link rel="alternate" type="text/html" href="http://wandora.org/w/index.php?title=Null_(query_directive)&amp;diff=6981&amp;oldid=prev"/>
				<updated>2009-08-25T10:22:15Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class='diff diff-contentalign-left'&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
			&lt;tr valign='top'&gt;
			&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;← Older revision&lt;/td&gt;
			&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;Revision as of 10:22, 25 August 2009&lt;/td&gt;
			&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 9:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 9:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;== Examples ==&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;== Examples ==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;del class=&quot;diffchange diffchange-inline&quot;&gt; &lt;/del&gt;Following example gets the superclass of input topic or null if it does not have a superclass.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Following example gets the superclass of input topic or null if it does not have a superclass.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&amp;#160; importPackage(org.wandora.query2);&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&amp;#160; importPackage(org.wandora.query2);&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Olli</name></author>	</entry>

	<entry>
		<id>http://wandora.org/w/index.php?title=Null_(query_directive)&amp;diff=6914&amp;oldid=prev</id>
		<title>Olli at 07:44, 21 August 2009</title>
		<link rel="alternate" type="text/html" href="http://wandora.org/w/index.php?title=Null_(query_directive)&amp;diff=6914&amp;oldid=prev"/>
				<updated>2009-08-21T07:44:58Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class='diff diff-contentalign-left'&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
			&lt;tr valign='top'&gt;
			&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;← Older revision&lt;/td&gt;
			&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;Revision as of 07:44, 21 August 2009&lt;/td&gt;
			&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 16:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 16:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&amp;#160;&amp;#160;  new Players(XTMPSI.SUPERCLASS_SUBCLASS,XTMPSI.SUPERCLASS)&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&amp;#160;&amp;#160;  new Players(XTMPSI.SUPERCLASS_SUBCLASS,XTMPSI.SUPERCLASS)&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&amp;#160;&amp;#160;  .whereInputIs(XTMPSI.SUBCLASS),&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&amp;#160;&amp;#160;  .whereInputIs(XTMPSI.SUBCLASS),&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&amp;#160;&amp;#160;  new &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;Players(XTMPSI&lt;/del&gt;.&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;SUPERCLASS_SUBCLASS,XTMPSI.SUPERCLASS)&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&amp;#160;&amp;#160;  new &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;If&lt;/ins&gt;.&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;COND&lt;/ins&gt;(),&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;&amp;#160;  .whereInputIs&lt;/del&gt;(&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;XTMPSI.SUBCLASS&lt;/del&gt;),&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&amp;#160;&amp;#160;  new Null().as(XTMPSI.SUPERCLASS)&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&amp;#160;&amp;#160;  new Null().as(XTMPSI.SUPERCLASS)&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&amp;#160; )&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&amp;#160; )&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;[[Category:Query directives]]&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;[[Category:Query directives]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Olli</name></author>	</entry>

	<entry>
		<id>http://wandora.org/w/index.php?title=Null_(query_directive)&amp;diff=6913&amp;oldid=prev</id>
		<title>Olli at 07:39, 21 August 2009</title>
		<link rel="alternate" type="text/html" href="http://wandora.org/w/index.php?title=Null_(query_directive)&amp;diff=6913&amp;oldid=prev"/>
				<updated>2009-08-21T07:39:35Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;== Description ==&lt;br /&gt;
&lt;br /&gt;
Returns then null value&lt;br /&gt;
&lt;br /&gt;
== Constructor ==&lt;br /&gt;
&lt;br /&gt;
Null()&lt;br /&gt;
&lt;br /&gt;
== Examples ==&lt;br /&gt;
&lt;br /&gt;
 Following example gets the superclass of input topic or null if it does not have a superclass.&lt;br /&gt;
&lt;br /&gt;
 importPackage(org.wandora.query2);&lt;br /&gt;
 importPackage(org.wandora.topicmap);&lt;br /&gt;
 new If(&lt;br /&gt;
   new Players(XTMPSI.SUPERCLASS_SUBCLASS,XTMPSI.SUPERCLASS)&lt;br /&gt;
   .whereInputIs(XTMPSI.SUBCLASS),&lt;br /&gt;
   new Players(XTMPSI.SUPERCLASS_SUBCLASS,XTMPSI.SUPERCLASS)&lt;br /&gt;
   .whereInputIs(XTMPSI.SUBCLASS),&lt;br /&gt;
   new Null().as(XTMPSI.SUPERCLASS)&lt;br /&gt;
 )&lt;br /&gt;
&lt;br /&gt;
[[Category:Query directives]]&lt;/div&gt;</summary>
		<author><name>Olli</name></author>	</entry>

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