Dear TC members,
below is a list where "transparency" and "opacity" is used in the
OpenOffice.org XML specification.
transparency
------------
Transparency is used for
a) the <draw:transparency> element, that defines a transparency gradient
b) the "draw:transparency-name" attribute, that applies to a
transparency gradient to a shape
c) the "draw:transparency" attribute, that specifies a single
transparency value for a shape or a background image
d) the "draw:shadow-transparency" attribute, that specifies the
transparency of a shadow
f) as special value "transparent" for the "fo:background-color" and
"style:text-background-color" that specify the background color for
paragraphs, text, etc.
opacity
-------
Opacity is used for
g) the "draw:stroke-opacity" attribute that specifies the opacity of a
stroke
With the expection of f), all usages of transparency are related to
drawing shapes and graphics, where SVG uses opacity values. f) is taken
from XSL-FO, that supports "transparent" as special color value. It is
the only usage of "transparent" or transparency in XSL-FO.
For this reason, I would like to propose to change all transparency
values to opacity values, with the exception of f). This exception seems
to be valid, because "transparent" is used here as an attribute value only.
Best regards
Michael