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No routing ought to be involved in sending requests from the 10.10.10.x subnet directly to 10.10.10.x. No gateways or anything like that, it ought to happen just by setting the network card on your...

Please please please, use code tags when posting input/output or any code.
Here. Added a few things to resolve 1., 2., 3.:
sed -n '/<measInfo measInfoId="25250000">/,/<\/measInfo>/ {/<measValue /...

Or with just "tr". List the characters you want to keep and use the "complement" function.

cat filename | tr -cd '[0-9]. \n'

883250 869.898 86432.4 809875.22 804609 60023 59715

# echo $x | perl -e '$y=<>; $y=~s/<\/?.*?>//g; print $y'
883250 869.898 86432.4 809875.22 804609 60023 59715

This may do the trick:


sed 's/<[^>]*>//g' input-file >output


It replaces all characters between < and > including the greater/lessthan symbols.

@jackma: Also, you were pretty close with tr. Just a small extension and you would've got what you wanted:
echo $x | tr -d '[:alpha:]' | sed 's/[<>]//g'