Web アプリケーションのルートがプラグイン・ディレクトリーであるということが前提となります。
<!ATTLIST extension
point CDATA #REQUIRED
id CDATA #IMPLIED
name CDATA #IMPLIED>
<!ELEMENT webapp EMPTY>
<!ATTLIST webapp
default (true | false) "false">
<extension point="org.eclipse.help.base.webapp">
<webapp default="true" />
</extension>
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