[SVGMobile12] 5.8.1: interaction of conditional processing and use is unclear

Section 5.8.1 of SVG Tiny 1.2 contains the following sentence:
# Similar to the 'display' property, conditional processing attributes
# only affect the direct rendering of elements and do not prevent
# elements from being successfully referenced by other elements (such as
# via a 'use').

It is clear from this that conditional processing attributes do not
prevent an element from being referenced by a 'use' element (i.e., they
do not make the reference invalid per [3]).  However, it is not clear
what this sentence implies about the processing of the cloned
non-exposed DOM tree attached to the 'use' element.  I see three
possibilities:

 1. The conditional processing attributes are processed on the
    referenced element and all its descendants.

 2. The conditional processing attributes are processed on the
    descendants of the referenced element but not on the referenced
    element itself.

 3. The conditional processing attributes are not processed on the
    referenced element nor any of its descendants.

It should be clear in section 5.8.1 [1] or in section 5.6 [2] which of
these is correct.  (I don't think (3) makes much sense, but it actually
seems to me to be what the specification currently says.  The Adobe SVG
plugin seems to implement (2).)

-David

[1] http://www.w3.org/TR/2005/WD-SVGMobile12-20050413/struct.html#ConditionalProcessingOverview
[2] http://www.w3.org/TR/2005/WD-SVGMobile12-20050413/struct.html#UseElement
[3] http://www.w3.org/TR/2005/WD-SVGMobile12-20050413/linking.html#HeadOverview

-- 
L. David Baron                                <URL: http://dbaron.org/ >
          Technical Lead, Layout & CSS, The Mozilla Foundation