Locale Filter in 2 places

The Locale filter data category is listed in two places:

• In section "5.9.9.3 Locale Filter" as a data category that is not used in
  XLIFF
• In section "5.9.6.3 Locale Filter" as a data category defined in the ITS
  module

I understand the reasoning behind this: If you have a source file with Locale
Filter you can either A) create an XLIFF where only
the relevant data are extracted, or B) create an XLIFF file with the ITS
metadata.

But I think it is highly confusing to list the data category in both sections.

If Locale Filter attributes can be used in XLIFF then we should have only
section 5.9.6.3. We should also have some text at the top
of that section that basically says something like:

• The best way to extract a source file that uses Locale Filter is to create an
  XLIFF file for each target locale with just the
  relevant content.
  [This by far the recommended option: in the real world very few XLIFF tools
  will be able to deal with that data category.]

• However, one can also use Locale Filter in XLIFF, and here is how you would do
  it... [and have the rest of the current section]