SC 3.1.4 edits

I've been editing SC 3.1.4 and its techniques in response to comments in
the surveys. There were a few non-editorial issues I wanted to bring up:
1.	There seems to be some sentiment that "Using the title attribute
to provide explanations of words or phrases
<http://trace.wisc.edu/wcag_wiki/index.php?title=Using_the_title_attribu
te_to_provide_explanations_of_words_or_phrases> " (formerly
"Supplemental Meaning Cues") is not a sufficient technique. Should it be
moved to Advisory?
2.	There are requests for discussion of when to use <abbr> and when
to use <acronym>. Does anyone know the answer? Is this a technology
issue? Is it a language issue that should refer to the general technique
"Providing the expansion or explanation of an abbreviation
<http://trace.wisc.edu/wcag_wiki/index.php?title=Providing_the_expansion
_or_explanation_of_an_abbreviation> "?
3.	Although I thought that "first in a delivery unit" was
unambiguous, there seems to be confusion about the meaning of "first" in
"Providing the abbreviation immediately following the first use of the
expanded form within the delivery unit
<http://trace.wisc.edu/wcag_wiki/index.php?title=Providing_the_abbreviat
ion_immediately_following_the_first_use_of_the_expanded_form_within_the_
delivery_unit> ". Does anyone have any suggestions for how to make this
clearer?
4.	There are lots of comments and questions on the general
technique  "Providing the expansion or explanation of an abbreviation
<http://trace.wisc.edu/wcag_wiki/index.php?title=Providing_the_expansion
_or_explanation_of_an_abbreviation> ". Christophe, would you be willing
to try to clarify what sorts of information should be provided for
different classes of abbreviations?

Loretta Guarino Reid
lguarino@adobe.com
Adobe Systems, Acrobat Engineering