[Zope-CMF] A couple basic newbie questions ...

[Lynn Walton]

I followed the PortalPoll tutorial, creating a CMF site under a folder
called tests.
I can login using http://mysite/tests/TestPortal03
Some questions I have are:

1) What type of document is the default index_html that is created for
me?  I'm guessing it is of type CMFDocument. But how do I know that?

2) When I click Metadata,  I don't understand the roll of the unlabeled
form element that is present due to the code:
    <select name="subject:list" multiple>
         </select>
    What is it supposed to be representing? How is it supposed to work?
Should it be showing up there?

3) Of the CMF users out there, how many use External (filesystem based)
images as opposed to ones stored in the ZODB, and why? Can someone share
what they see are the advantages/disadvantages and/or what factors might
cause them to choose one or the other?  Same with using FileSystem based
content types? When should I choose that ?    I'm looking at the new
http://www.zope.org/Members/eenge/CMFBoringContent/  which is apparently
using filesystem based.  What capabilities do I gain and lose by
choosing a filesystem based?

Thanks,
Lynn