Joining strings/variables in XSLT/Xpath

Hello EE,

I've been looking everywhere but I can't seem to find an answer (maybe I'm not looking hard enough... :()

Anyways, I have an XML document of addresses that I import and extract the variables like the following:

<xsl:variable name="StreetNo" select="Address/StreetNo"/> 
<xsl:variable name="Street" select="Address/Street"/> 
<xsl:variable name="Suburb" select="Address/Suburb"/> 
<xsl:variable name="State" select="Address/State"/> 
<xsl:variable name="Postcode" select="Address/Postcode"/>

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I have to join all the variables into one string into a new variable "NewAddress" like the following:

<xsl:variable name="NewAddress" select="$StreetNo + ' ' + $Street + ' ' + $Suburb + ', ' + $State + ' ' + $Postcode"/>

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I want it so it'll print a string like "123 Smith Street Sydney, New South Wales 2000".

I'm not getting the right output and it's returning as "NaN". I'm pretty sure the "+" only works with numbers and using a "." doesn't seem to work either.

Hope this makes sense. Can anyone help me with this?

Thank you very much in advance.