basedir property and ant task

[John . D . Casey]

When you call another build.xml file in another directory from your 
main one, what is the value of the "basedir" property in the child?  My 
intuition says it should be the directory in which the child build.xml 
lives, but in practice I'm seeing something different.  I'm using Ant 
1.3, and when I access this property, I see that the basedir property 
is set to the directory of the parent build.xml file...is this a bug?

Thanks in advance,
John Casey