On Jul 25, 2012, at 17:50, Benjamin Fritz wrote:

> That's interesting that it works like a switch underneath. But it IS
> very possible to pull in *directory* externals from other
> repositories

Absolutely.

> which makes me wonder about whether this is relevant.

It's my understanding that file externals (which are a relatively new feature 
for Subversion) are implemented very very differently under the hood from 
directory externals (which have been around for a long long time) so it's not 
surprising they would have very different restrictions and behaviors.

> The explanation works for file externals but doesn't explain why
> directory externals from other repositories work.

Directory externals are implemented as additional "svn checkout"s (or updates) 
following the primary checkout (or update).

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