Olli at 09:57, 21 August 2009

2009-08-21T09:57:13Z

Olli at 08:02, 20 August 2009

2009-08-20T08:02:39Z

New page

== Description ==

Gets the topic with subject identifier equal to the string value of the active column value of input.

== Constructor ==

new Topics()

[[Category:Query directives]]

← Older revision		Revision as of 09:57, 21 August 2009
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	new Topics()		new Topics()
		+
		+	== Examples ==
		+
		+	You can get a single topic as follows.
		+
		+	importPackage(org.wandora.query2);
		+	new Topics().from("http://www.wandora.org/core/contenttype")
		+
		+	Note that in many cases it is not necessary to do this explicitly. For example if you want to get instances of content type you can simply do following.
		+
		+	importPackage(org.wandora.query2);
		+	new Instances().from("http://www.wandora.org/core/contenttype")
		+
		+	''Instances'' as well as all other topic maps directives can take the input topic as a subject identifier so it is not necessary to convert it into a topic. However you may want to do it if you are going to need the topic for something else as well. For example.
		+
		+	importPackage(org.wandora.query2);
		+	new Instances().from(
		+	new Topics().as("#contenttype").from("http://www.wandora.org/core/contenttype")
		+	)
		+
		+	This preserves the content type topic in the results. It is also an actual topic and not a subject identifier string. If this query was part of some bigger query, you could use the topic for some other purpose some place else.

	[[Category:Query directives]]		[[Category:Query directives]]

Topics (query directive) - Revision history

Olli at 09:57, 21 August 2009

Olli at 08:02, 20 August 2009