ZCML File
meta.zcml

<configure
    xmlns="http://namespaces.zope.org/zope"
    xmlns:meta="http://namespaces.zope.org/meta"
    >
<meta:directive
    namespace="http://namespaces.zope.org/zope"
    name="grant"
    schema=".metadirectives.IGrantDirective"
    handler=".metaconfigure.grant"
    />
<meta:directive
    namespace="http://namespaces.zope.org/zope"
    name="grantAll"
    schema=".metadirectives.IGrantAllDirective"
    handler=".metaconfigure.grantAll"
    />
<meta:directive
    namespace="http://namespaces.zope.org/zope"
    name="role"
    schema=".metadirectives.IDefineRoleDirective"
    handler=".metaconfigure.defineRole"
    />
</configure>