What is a "PI marker" or "programming instruction marker"

[Writer]

>> Can't you output to CHM using oXygen?

> 
> Sure, in the same sense that you can create 
> a large Web site using only Notepad.  ;-)

So...um...like...are you saying that I'm doin' it rong?

> I'd say if someone has a looming deadline,
> that is **not** the time to start learning
> how to customize the OT...  LOL!

I was just inquiring. I'm using oXygen to learn XML and XSLT stuff, but I've not explored it's DITA capabilities to any great degree. I thought CHM output was there, but didn't know if it was useful or not. The OP mentioned restricting spending. I thought if he already had access to CHM output, why not use that.

Oh well.

Nadine