[news.eclipse.platform.rcp] How to implement XML-Syntaxcheck??

["Teichgraf" <teichgraf@xxxxxx>]

HoHoo
I have the XML Editor Template from the Eclipse Plugin ExtensionWizard. This 
cool Template has Syntaxhighlighting and some other nice features included. 
So I can load XML files and they get nice colored, but I want to check the 
Syntax of the XML Document. For example, if a tag was closed. <tag> </tag> 
Something like the Plugin "XMLBuddy" does.
My question now is, where can I start? I am a bit confused. A LineRuler 
justs highlights the text or? So what class, interface do I need to check 
the syntax? Any documentaion?

*Rene*