Hello Baz,
The skinning framework in flex 4 is called spark. So essentially all the 
components inheriting from SkinnableComponent(Base class for a spark component) 
are in library://ns.adobe.com/flex/spark. you can give it any namespace prefix. 
Initially the namespace is 's'. It will look like 
xmlns:s="library://ns.adobe.com/flex.spark". Gumbo is the code name for flex 4, 
similar to Moxie of Flex 3. Hope this clears your doubt.

--
Chetan Sachdev
http://www.riageeks.com

--- In [email protected], Baz <thinkl...@...> wrote:
>
> I've been playing around with Flex 4 (build 6192) and it seems that the
> namespaces have changed a lot since previous builds. I only say this because
> none of the examples online seem to work. After lots of mucking around, I
> was able to get the following test application with these namespaces to run:
> 
> <?xml version="1.0" encoding="utf-8"?>
> <fx:Application
>     xmlns="http://ns.adobe.com/mxml/2009";
>     xmlns:fx="library://ns.adobe.com/flex/spark"
>     xmlns:mx="library://ns.adobe.com/flex/halo">
> 
>     <mx:VBox>
>         <fx:Button label="Gumbo Button"/>
>         <mx:Button label="Halo Button" />
> 
>        <fx:ButtonBar id="orangeToggleBar" requiresSelection="true">
>             <fx:dataProvider>
>                 <fx:ArrayCollection source="[Flash, Director, Catalyst,
> ColdFusion]" />
>             </fx:dataProvider>
>         </fx:ButtonBar>
>     </mx:VBox>
> </fx:Application>
> 
> The FX namespace pointing to spark doesn't seem to be right, shouldn't it be
> SP or S with FX as a separate space? Also, what about the
> ns.adobe.com/flex/GUMBO library, is that gone? I saw it a lot online but I
> think it may have been combined into the main (unnamed) namespace, what do
> you think?
> 
> Cheers,
> Baz
>


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