How to treat emphasised text?

I'm currently marking up "Through the Looking Glass", and I'm using an old
"dead-tree" copy, and a more recent annotated copy ("The Annotated Alice",
by Martin Gardner), to help me figure out what's what.

Query 1 (more posts to follow!):
The etext has converted almost all the emphasised text (in both hard copies
I have, shown in italics) to uppercase - almost, but not all: an emphasised
"I" is shown as "_I_". My inclination is to convert all such text (mostly
single words) to the inline <ital>lowercase</ital> form. To add to my
inclination, the hard-copy versions also use uppercase for a different type
of emphasis in parts of the text (labels and signs); these words and phrases
would then be apparent as different from other emphasised text. Is this an
acceptable method of marking-up the etext?

Rob

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