Standardized XML Response

It would be nice for parsing Solr output if all output followed a standardized XML schema.

For example: add, commit, optimize, etc. all return the following:
<result status="0"></result>
But do not include an XML declaration line.

When Solr throws an error - we get a standard java backtrace. It would be nice if this was formated in XML as well with something to the effect of:
<?xml ... ?>
<result status="error">
<backtrace>....</backtrace>
</result>