OT: Less-restrictive alternative to XML and XML visualizers?

[BCS]

Reply to Nick,

> I have a need for an inexpensive (preferably freeware or open-source,
> obviously), alternate to using XML and an XML viewer (such as
> MindFusion's XML Viewer). The main problem with XML is that I need
> something that will allow node names to contain any arbitrary text
> character (or at least just the ascii symbols such as parentheses,
> comma, etc). Any ideas?
> 

What are you wanting to /do/ with it. I ask because I know of a product (Ok 
I'm helping develop it) that fits in part of the nich that XML tries to cover.