SharePoint DataView Show Items from last week -

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I have SharePoint DataView WebPart which is set to combine data with some different lists. I want to filter to show data I'm able to filter it to show data from this week, but I failed to show last week's data.

I have set up a Web Part filter set below:

filter

It translates the following XSL: 

  & lt; Xsl: variable name = "rows" = "/ dsQueryResponse / rows / row [number (translate (sub-base (@ wik_x0020_starting, 't'), '-', '') & amp; lt; = number (Translate (first $ $, today, 't'), '-', '') and number (translate (before sub-letter (@ weeks_x0020_ ending, 't'), '-' '')) & Amp; gt; = number (translate (first letter $ $, 't'), '-', '')] / />

I guess I understand this Need [current date] - 7, however, I did not understand how to subtraction Is there anyone facing such a situation? Am I going to go about this right? / P>

I managed to hack something which I want to:

I have created a calculation column on that list that shows the beginning of the week + 7 days, And used it to compare with the current date.


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