Compare a dynamically driven value in XSL

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C#

ASP.NET

XSLT

Im using XSLt to transform a table and XML data to show in the UI page, This is my question

<xsl:variable name="Work to do" select="DocumentElement/Working[(worktype='wash' or worktype='clean' worktype='sweep') and (attendance= 'Present' or attendance = 'permit')]"></xsl:variable>

<xsl:variable name="Work to do" select="DocumentElement/Working[(worktype='wash' or worktype='clean' worktype='sweep') and (attendance= 'Present' or attendance = 'permit')]" xmlns:xsl="#unknown">
I would like to externalize the worktype='wash' or worktype='clean' worktype='sweep' from the database I retrieved the data but don't know how to do in XSL. Here worktype is taken from table and I want to load 'wash','clean' dynamically through XML. Please help me