Home/ Questions/Q 705455
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-14T04:03:20+00:00

As far as I know, the support for library://ns.adobe.com/flex/halo namespace has been dropped, and

  • 0

As far as I know, the support for library://ns.adobe.com/flex/halo namespace has been dropped, and now we have to use library://ns.adobe.com/flex/mx instead (reference). Can someone provide if there’s any difference between the two namespaces?

I am just starting to learn Flex and this change make me confused. For example, if I have an <mx:Tree> tag in my mxml document, the compiler complains that <mx:Tree> could not be resolved to a component implementation. But if I change my mx namespace to use the old one instead (halo), it successfully compiled without error.

Updated:
By the way, I use Flex SDK command line compiler in Windows.

mxmlc --version
Version 4.0.0 build 10485
Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    Adobe changed the “halo” namespace in order to more clearly differentiate it from the spark namespace. All you need to do is find/replace the old URI with the new one. The existing halo components will continue to work as is just with a new namespace.

    • 0