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The if() Function

Release 2.0 - ...

Syntax

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string if(boolean, string, string)

Description

Function if() evaluates the first parameter as boolean, returning the second parameter when true, otherwise the third parameter.

Example

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<xforms:model xmlns:ex="http://example.com">
   <xforms:instance>
      <ex:driver>
         <ex:age>18</ex:age>
         <ex:points>12</ex:points>
      </ex:driver>
   </xforms:instance>
</xforms:model>
 ...
<xforms:group>
   <xforms:output value="if(ex:age &gt; 17, 'Yes', 'No')">
      <xforms:label>Adult : </xforms:label>
   </xforms:output>
</xforms:group>
<xforms:group>
   <xforms:output value="if(ex:points &lt; 6, 'Safe', 'Unsafe')">
      <xforms:label>Safety : </xforms:label> 
   </xforms:output>
</xforms:group>

The above example returns "Yes" and "Unsafe" respectively.

Specification

Link to the XForms specification: the if() function.

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