ZCML File
meta.zcml

<configure
    xmlns="http://namespaces.zope.org/zope"
    xmlns:meta="http://namespaces.zope.org/meta"
    >
<meta:directives
    namespace="http://namespaces.zope.org/browser"
    >
<meta:complexDirective
    name="form"
    schema=".metadirectives.IFormDirective"
    handler=".metaconfigure.FormDirective"
    >
<meta:subdirective
    name="widget"
    schema=".metadirectives.IWidgetSubdirective"
    />
</meta:complexDirective>
<meta:subdirective
    name="widget"
    schema=".metadirectives.IWidgetSubdirective"
    />
</meta:complexDirective>
<meta:subdirective
    name="widget"
    schema=".metadirectives.IWidgetSubdirective"
    />
</meta:complexDirective>
<meta:subdirective
    name="widget"
    schema=".metadirectives.IWidgetSubdirective"
    />
</meta:complexDirective>
<meta:subdirective
    name="widget"
    schema=".metadirectives.IWidgetSubdirective"
    />
</meta:complexDirective>
</meta:directives>
</configure>