Getting data from xml file, how?

@phsdv wrote:

I have some data that I want to get into HA. The input is quite long, so with the RESTfull integration I am over the 256 char limit. When using grep period I get all the data I am looking for see below:
(for the curious people, this is the output of a windturbine in Wh).

$ curl --silent https://zep-api.windcentrale.nl/production/2 | grep period

        <subset interval="HOUR" period="DAY" tstart="2020-04-06 00:00:00" tend="2020-04-06 23:59:00" sum="14632.255">
        <subset interval="DAY" period="MONTH" tstart="2020-04-01 00:00:00" tend="2020-04-30 00:00:00" sum="88488.797">
        <subset interval="DAY" period="WEEK" tstart="2020-03-31 00:00:00" tend="2020-04-06 00:00:00" sum="91294.59000000001">
        <subset interval="MONTH" period="YEAR" tstart="2020-01-01 00:00:00" tend="2020-12-31 00:00:00" sum="2189460.426">
        <subset interval="YEAR" period="LIFETIME" tstart="2013-01-01 00:00:00" tend="2020-12-31 00:00:00" sum="3.4027436681E7">

What I want to see in HA is for each different period the value of the sum. Thus I would like to get this:

somename.DAY= 14632.255
somename.MONTH=88488.797
...
somename.YEAR=3.4027436681E7

How to do this in HA? Any pointers is appreciated.
I have it working for DAY only with the use of curl|grep|awk|sed but it is a bit long commandline and only for 1 sum, not for all.

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