optimization - How can I shorten this XSLT snippet? -

i have repeat following xslt snippet 100 times , small possible. there way make equivalent xslt snippet shorter?

<xslo:variable name="myvariable" select="//this/that/anotherthing" />     <xslo:choose>       <xslo:when test="string($myvariable) != 'nan'">         <xslo:text>1</xslo:text>       </xslo:when>       <xslo:otherwise>         <xslo:text>0</xslo:text>       </xslo:otherwise>     </xslo:choose> 

i'm setting state of checkbox based on whether or not value exists in //this/that/anotherthing in source xml.

can xslt 1.0 or xslt 2.0, doesn't matter.

you can use if instead of xsl:choose (xslt 2.0 only)...

<xsl:value-of select="if (string(number(//this/that/anotherthing)) = 'nan') 0 else 1"/> 

i dropped xsl:variable, if need other reason, can put back.

you create function...

<xsl:function name="local:isnumber">     <xsl:param name="context"/>     <xsl:value-of select="if (string(number($context)) = 'nan') 0 else 1"/> </xsl:function> 

usage...

<xsl:value-of select="local:isnumber(//this/that/anotherthing)"/>