Nesting Invalid HTML in XML Docs

[callingshotgun]

I'm attempting to put together an XML format for posting/migrating blog data, and while I'm in the design phase, I came across an interesting question. What's the best way to take HTML that may or may not be valid, and nest it in an XML document, while still keeping the XML valid? I'm trying to make it so that the data can be migrated between all manner of blogging apps (LJ, diaryland, self-hosted ones like Wordpress, Pivot, B2Evolution), and most of them have their own unique quirks that break valid XML (some, for instance, use

instead of

) if just dropped in there. Is there some "comment" element, or other way of flagging chunks of data that shouldn't be explicitly validated? Should I just leave it up to the software processing the data to replace all "keyword" type characters (<> etc) with their HTML equivalents? < &rt; etc... The problem with this approach, is that there are a ton of these, and I don't want to place undo stress on those writing the software to deal with this format. Any ideas on valid ways to tell an XML parser "this is valid, just ignore it", or simpler ways to store unvalidated HTML in a valid XML doc, or in general just ideas as to what approach I should take? Oh, if you want to follow the progress of the format, http://www.callingshotgun.net/drupal Much appreciated. -Alex

[jkersch]

tried ?

[callingshotgun]

(Apparently Greener in XML than I thought... never used CDATA) Looked it up... Yeah, that's absolutely perfect, thanks! Damn you, online references, for making me feel leeter than I was! -Alex