If then statement in XSLT?

Questions
1

I made an XSLT which shows a different docType for every day of the week. I have set the weekdays:

<xsl:variable name="today" select="Exslt.ExsltDatesAndTimes:dayinweek()"/>
...
<xsl:if test="$today = '2'">
	call docType "Monday"
</xsl:if>
<xsl:if test="$today = '3'">
	call DocType "Tuesday"
</xsl:if>

Now I copy the same piece of XSLT for the seven weekdays. Is is possible to set a string depending on the outcome of another string?

Something like if $today = "4" then $docType = "Wednesday"?

Thanks,
Ralph

This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/16457-if-then-statement-in-xslt