[Standards-JIG] how to handle IQ while invisible

[Ian Paterson]

> How about "there SHOULD NOT be whitespace within an XML stanza but there
> MAY be whitespace between XML stanzas"?

How about "the content of an XML element SHOULD NOT contain whitespace 
unless it contains no markup and is not empty"?

The use of "SHOULD" instead of "MUST" discourages non-essential whitespace 
while enabling backwards compatability. It also means XHTML-IM elements MAY 
contain both spaces and markup - i.e. there would be no strict need to use 
"".

We could add the following clarification:
"the stream element MAY contain both whitespace and markup"

- Ian