> every
> element in the OPML version now has a "created" attribute.
>
> This means that every item is now identifiable, even if it changes, and
> should make new kinds of distribution possible.

Three questions:

[1] Must all 'created' values within a given OPML be unique ??

[2] If the answer to [1] is 'no', is the value of the 'text'
attribute used as a secondary identification key ??

[3] If an <outline> element does not possess a 'created' attrib,
does it default to the 'created' value of the nearest ancestor possessing
a 'created' attrib, or is 'created' just undefined for that
<outline> element ??