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The xsl:if Element

All programming languages contain a construct to test for an item that can be only either true or false. If the value is true, a section of code is executed. If it's false, the first section is skipped, and another section may or may not be executed. In JavaScript, the construct is an if-else statement. The else part is optional. If your goal is to execute a segment of code when the value is true and do nothing otherwise, the else is not included.

In XSL, you can use the xsl:if command to construct an expression that will control the conditional execution of a block of XSL code. The delimiters of the block of code are the opening and closing <xsl:if> tags. There's no companion xsl:else command, although it can be mimicked ...