elementtree terminology + tangential questions

[mirandacascade at yahoo.com]

Was prompted to ask these questions when reading the following link:

http://effbot.org/zone/element-infoset.htm#mixed-content

provides a clear explanation of what the tail member is in the
elementtree package.

Questions:
1) In the xml world, is the text between an element's end tag and the
next tag referred to as the "tail"?
2) None of the xml documents to which I've had exposure (a very, very
small set) have had text between an element's end tag and the next tag,
hence the following question: are there some 'best practices' advice
available to help one decide when it's a good idea to put text between
an element's end tag and the next tag as opposed to putting text in the
text property of an element?
3) Are these questions appropriate for the comp.lang.python group, or
should they be directed to a different group?

Thank you.