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possible ambiguity over fo:flow-map behavior

From: Glen Mazza <grm7793@yahoo.com>
Date: Tue, 13 Sep 2005 09:25:27 -0700 (PDT)
Message-ID: <20050913162527.69876.qmail@web81904.mail.mud.yahoo.com>
To: XSL Editors List <xsl-editors@w3.org>

Editors,

The fo:flow-map description appears ambiguous over
whether the source flow is to be duplicated (repeated)
into each target within the fo:flow-target-list, or is
to flow from one target to the next target
sequentially, in the order that the targets are
defined in the fo:flow-target-list.

Both have their use cases--in the case of duplication,
for example, to have the same text printed in opposing
side regions; or in the case of flowing from one
fo:region-body to the next, of having more power in
creating a newspaper-style layout.

>From http://www.w3.org/TR/xsl11/#fo_flow-map:

"For each fo:flow-assignment child of the fo:flow-map,
having an fo:flow-source-list child S and an
fo:flow-target-list child T, we say that the
fo:flow-map assigns -->each<-- of the flows referenced
by the fo:flow-name-specifier children of S to the
regions referenced by the fo:region-name-specifier
children of T."

"Each" here, to me, implies duplication/repetition
instead of flowing from one target to the next.  I'm
unsure if that was the SG's intent, however.

In the same section a similar ambiguity occurs.  While
the WD explicitly says *sources* are combined below,
the WD is somewhat vague on whether the *targets* are
combined or just have the source duplicated in the
multiple regions:

"The source list is a sequence of flow names whose
corresponding fo:flow objects (in the referring
fo:page-sequence) are treated as a single fo:flow for
composition purposes.  The target list is a sequence
of region-names which identify the region or regions
on each page which are used for the source content." 

I would recommend the text somehow be made clearer
indicating the layout intent for fo:flow-map.

Thanks,
Glen



		
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