This module covers inline vertical alignment and special typographic effects
for initial letters, such as drop caps.
Changes since the previous WD are listed at:
https://www.w3.org/TR/2016/WD-css-inline-3-20160524/#changes and consist of:
* Adding values for the ideographic and middle baselines.
* Clarifying interaction of ''dominant-baseline: auto'' with SVG glyph positioning.
* A few minor editorial improvements.