If you create a master text document, and include into it one or more
sub-documents that are sourced from a WebDAV server over a URL (attempted both
http:// and vnd.sun.star.webdav:// links), the sub-document will be imported
correctly. However the Navigator side-window will not allow you to double-click
on the sub-document, nor click the "Edit" button, to access a read/write version
of the sub-document. Double-clicking or clicking the "Edit" toolbar button does
nothing at all while the URL-linked sub-document is selected.

This problem does not exist if the sub-document is linked in via a file path
(z:\...) to the same WebDAV server (NetDrive providing the linkage.) If both URL
and path-linked files are included, only the path-linked sub-documents can be
opened for editing. It happens regardless of whether or not the WebDAV server is
secured. There are no errors reported, and server logs indicate OpenOffice.org
is not even attempting to contact it -- it's not because the server is throwing
any errors. These same sub-documents can be opened and saved properly if using
File->Open... and pasting in the same URL used to link the document into the
master document. It does not matter whether the master document was pulled from
the WebDAV server or not; the URL's given to it were absolute, and it did
succeed in loading them the first time (for inclusion.)

The problem only seems to be with the Navigator UI refusing to open the
sub-documents when double-clicking/"Edit"-clicking. If that worked, I think the
rest would work as well. (This is not a request for the ability to edit
sub-documents directly from inside the master document without opening them into
their own editor window -- while that would be helpful, it's not a current
feature even with local files, so I'm not asking.)

Support thread:

http://user.services.openoffice.org/en/forum/viewtopic.php?f=30&t=17491&sid=4524bf0528d98bb289d6120826c791aa&p=80535#p80535

(Side-note, possibly a separate bug: "update selection" on URL-linked WebDAV
sub-document fails, colors sub-document entry in red, removes text from master
document. Re-inserting the document, with the exact same URL, works just fine.
Opening the master document the first time works fine too.)

I do not know if this is platform- or OS-specific. Tested platform/OS: PC/WindowsXP.