layout hierarchies

[Laurie Harper]

Hi, how do I create layout tile hierarchies so that one layout extends 
another and contributes additional content to it? What I'd like to have 
is a base layout which contains markup common to every page, and then 
'child' layouts that extned the base layout and add section-specific 
additional markup. Page tiles would then use the 'child' layout to get 
the page and section layout rendered. Something like this:

    <definition name="/base.layout" path="/pages/base/layout.jsp">
        <put name="title" value="PAGE TITLE"/>
    </definition>
    <definition name="/section.layout" extends="/base.layout" 
path="/pages/section/layout.jsp">
        <put name="title" value="The Section Title"/>
	<put name="secion-name" value="SECTION NAME"/>
    </definition>

    <definition name="/section.view" extends="/section.layout">
        <put name="section-name" value="The Section Name"/>
        <put name="content" value="/pages/section/view.jsp"/>
    </definition>
That's how I tried to set it up, but the 'path' attribute on 
/section.layout overrides the 'path' attribute on /base.layout, so the 
content of /pages/base/layout.jsp isn't rendered. Also, the implicit 
'content' attribute used by /pages/base/layout.jsp and 
/pages/section/layout.jsp conflict. I also tried this:

    <definition name="/base.layout" path="/pages/base/layout.jsp">
        <put name="title" value="PAGE TITLE"/>
    </definition>
    <definition name="/section.layout" extends="/base.layout">
        <put name="title" value="The Section Title"/>
        <put name="secion-name" value="SECTION"/>
        <put name="content" path="/pages/section/layout.jsp"/>
    </definition>
    <definition name="/section.view" extends="/section.layout">
        <put name="secion-name" value="The Section Name"/>
        <put name="section-content" value="/pages/section/view.jsp"/>
    </definition>
but that didn't work as the 'section-name' attribute isn't defined in 
the tiles context available to /pages/section/layout.jsp. Moving the 
'put' for the 'content' attribute down into the /section.view definition 
doesn't seem to help; I get the same error.

Logically, I'm looking for something like this:
+---------------+           +----------------------+
| /base.layout  |           | /section.layout      |
|---------------|           |----------------------|
| title: String | includes  | title: String        |
| content: JSP  |---------->| section-name: String |
+---------------+           | section-content: JSP |
                            |----------------------|
                            | title = "The Se..."  |
                            | content = /path/...  |
                            +----------------------+
                                    |
                                    | includes
                                    |
                                    V
                         +-----------------------------+
                         | /section.view               |
                         |-----------------------------|
                         | section-name = "The se      |
                         | section-content = /path/... |
                         +-----------------------------+
Is what I'm trying to do possible? Is my objective clear from the above? 
I can put together a more complete demo if necessary.

L.
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