Exclude literal layout XML nodes from autoindentation

[Sam Varshavchik]

I'm trying to figure out how to get emacs's autoindent, both Tab and 
indent-region, to work in the manner that I like, when editing XML 
documents, and specifically Docbook documents.

I'd like to be able to easily autoindent my document, except for a couple of 
XML nodes whose whitespace content is significant, like <literallayout> or 
<programlisting>. In simple XML major mode, when I re-indent a large reason, 
I then have to go back and undo all the indention added in all the 
<programlisting> nodes.

After some Googling, I tried nxml. After assigning the "Docbook" ID, 
according to nxml's docs (although it's not quite clear to me how nxml deals 
with different tags used by different versions of Docbook), I find that 
nxml-mode still autoindents XML nodes that have significant whitespace.

I also tried psgml, but it looks like psgml is having problems parsing 
Docbook DTDs. Found a bunch of ancient mailing list messages to that effect, 
and it looks like that this is still the case. The current released version 
of psgml, which is in Fedora, is 1.2.5, and it dated 2002. I built the 
"Alpha" releases of psgml, 1.3.1 and 1.3.2, and tried those -- they still 
can't parse Docbook DTDs.

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