Get Namepaces and find uri of prefix

Problem:

• You have an XML with a lot of namespaces 
• you need to create namespace Objects for a prefix
• the namespace uri could change in different environements

Solution

1. Get all Namespaces:
   
   var namespaces : Array = _xformsData.namespaceDeclarations();  
   
   
2. Loop them and search for the prefix and save the namespace:
   
   var ns:Namespace;
   var i:int = namespaces.length;
   while(i--){
                   if(namespaces[i].prefix == 'xforms'){
                       ns = new Namespace(namespaces[i].prefix,namespaces[i].uri);
                       break;
                   }
               }