The compare() Function
Release 2.0 - ...
Syntax
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number compare(string, string) |
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Description
This function returns -1, 0, or 1, depending on whether the value of the first argument is respectively less than, equal to, or greater than the value of second argument based on lexicographic comparison using Unicode code point values.
Example
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<xforms:group>
<xforms:output value="compare('apple','orange')">
<xforms:label>compare('apple','orange') : </xforms:label>
</xforms:output>
</xforms:group>
<xforms:group>
<xforms:output value="compare('apple','apple')">
<xforms:label>compare('apple','apple') : </xforms:label>
</xforms:output>
</xforms:group>
<xforms:group>
<xforms:output value="compare('orange','apple')">
<xforms:label>compare('orange','apple') : </xforms:label>
</xforms:output>
</xforms:group>
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The above example returns -1, 0 and 1 respectively.
Specification
Link to the XForms specification: the compare() function.