linux - Lowercase all text except xml tags -

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i've got large number of tagged strings:

watch <team>philly's</team> game what's on <time>wednesday night 8 o'clock</time>

i lowercase text except xml tags. i.e.

watch <team>philly's</team> game what's on <time>wednesday night 8 o'clock</time>

i can lower case text using awk:

awk '{print tolower($0)}' file.txt

but have no idea how avoid xml tags. languages/tools welcome.

this sed (gnu) one-liner may help:

sed -r 's/([^<>]*)($|<)/\l\1\e\2/g'

with example:

kent$ echo "watch <team>philly's</team> game what's on <time>wednesday night 8 o'clock</time>"|sed -r 's/([^<>]*)($|<)/\l\1\e\2/g'  watch <team>philly's</team> game what's on <time>wednesday night 8 o'clock</time>

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