I'm investigating alternatives to macros, the following appears to work, but 
does anyone see anything particularly wrong or limiting with this 
implementation?

Thanks,

Kevin Smith


app.py

    class PageView(BrowserView):

        content = pagetemplate.ViewPageTemplateFile('page.pt')

        def __call__(self):
            view = zope.component.getMultiAdapter( (self.context, 
self.request), name="masterpage.html")
            view.content = self.content
            return view()

    class NavbarContentProvider:
        implements(IContentProvider)
        adapts(Interface, IDefaultBrowserLayer, Interface)

        def __init__(self, context, request, view):
            self.context = context
            self.request = request
            self.__parent__ = view

        def update(self):
            pass

        def render(self):
            return '<a href="/">Home</a>'


configure.zcml

    <browser:page
        name="masterpage.html"
        for="*"
        template="masterpage.pt"
        permission="zope.Public"
        />

      <browser:page
          for="*"
          name="mppage1.html"
          class=".app.PageView"
          permission="zope.View"
          />

    <adapter
        factory=".app.NavbarContentProvider"
        name="navbar.ContentProvider"
        />


masterpage.pt

    <html>
        <head><title>master.pt</title></head>
            <body>
                <div class="hd"><h2>master.pt</h2></div>
                <div class="bd">

                    <div lass="nav">
                        <span tal:replace="structure 
provider:navbar.ContentProvider" />
                    </div>

                    <div class="content">
                        <div tal:replace="structure view/content" />
                    </div>

                <div class="ft">master.pt footer</h2>
            </body>
    </html>

page.pt

    <h2>page.pt</h2>
    <div tal:replace="structure view/content" />


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