Talking about MarkupStandardPlanB, some people started thinking about an interchange format again. Should the MeatBall:WikiMarkupStandard serve as a MeatBall:WikiInterchangeFormat?
Moin has had an XML export for a while, now.
Example:
Selected snippets to illustrate paragraphs, unordered lists, InterLinks and ordinary page links:
<ul>
<li>
<p>
<pagelink pagename="HelpForDevelopers">HelpForDevelopers</pagelink>
- the rules that govern MoinMoin development
</p>
</li>
</ul>
<p>
<interwiki pagename="WikiClone" wiki="Wiki">WikiClone</interwiki>
</p>I would also like to request an encoding for objects that are not part of the default format, though-
ALT-FORMAT MOINMOIN || table || header || || a || 1 || || b || 2 || || c || 3 || ALT-FORMAT ENDS
Something like that.
Then, if the target can figure it out, Yay.
If not, it can just either say, "There's something here I don't understand," or it can just ignore it.
Without a way of escaping mark-up characters, the standard isn't as expressive as simple plain text 
I don't understand this point.
If I actually want to write ''something looking italic, but not'' without the quotemarks vanishing, how do I do that with the scheme above?
You don't, of course. But that doesn't coun't as "less expressive". Imagine a similar request: "I want an empty line without it being a new paragraph. Impossible!" Yes, but not important.
A new paragraph is an empty line, expressed in HTML, but italic tags are not quote marks: the analogy fails. If we want to use the standard for interchange, we must accept that double-triple-quote mark-up is not standard, and there must be a way of avoiding it, like substituting in HTML entities for quotes. However, I suspect the misapprehension here is mine: interchange wasn't mentioned above
Ah, well.
Yeah, I mistook it for interchange. 
It's very similar: