View source for FAQ Can my extension point schema contain nested elements?

Yes. The extension point schema supports top-level elements with attributes. Each attribute can refer to another element in the schema.  The Schema Editor has a difficult job indicating this, but the nesting can be observed in Figure 4.4 that shows an example that uses the <tt>org.eclipse.ui.actionSets</tt> extension point. The schema for this extension point explicitly defines the grammar rules for nesting one or more menus and actions into one action set (Figure 4.5). A similar hierarchy can be used for your own extension point schemas.

&nbsp;&nbsp;&nbsp;&nbsp;<img src=../images/actionSets.png>
&nbsp;&nbsp;&nbsp;&nbsp;'''Figure 4.4'''&nbsp;&nbsp; Nested elements in extension point schema

&nbsp;&nbsp;&nbsp;&nbsp;<img src=../images/schema.png>
&nbsp;&nbsp;&nbsp;&nbsp;'''Figure 4.5'''&nbsp;&nbsp; Extension point grammar rules

== See Also: ==
*[[FAQ What is an extension point schema?]]

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