When to use the XSLT < if > element?

When to use the XSLT < if > element?

XSLT Element. The element is used to put a conditional test against the content of the XML file. The Element. To put a conditional if test against the content of the XML file, add an element to the XSL document.

How to test an expression in XSLT for Dummies?

To evaluate numeric expressions, you can use the traditional forms of comparison that you learned back in 3rd grade math: < , <= , > , >= , and =. However, in XML, you cant use the < character in your XSLT stylesheet, because XML reserves this character for marking the start of an element tag.

Which is the most important part of the XSL?

Arguably the most important part of any xsl:if instruction is its test attribute. Its expression must be true in order for the xsl:if content to be processed . In addition to looking for a specific element or attribute value as I did in the preceding example, you can do a variety of tests inside the expression.

When does an expression have to be true for XSL?

Its expression must be true in order for the xsl:if content to be processed . In addition to looking for a specific element or attribute value as I did in the preceding example, you can do a variety of tests inside the expression. To test if an attribute exists, you use:

Do you need to test if attribute before XSL?

Because of this you need to test whether there is a something attribute before your xsl:if condition is evaluated. Based on the solution above (of @Mathias Müller and as suggested by @Tim C) you can even speed up things a little bit using Short-Circuit Evaluation for the or:

How to add a conditional if test in XSL?

To put a conditional if test against the content of the XML file, add an element to the XSL document. …some output if the expression is true… To add a conditional test, add the element inside the element in the XSL file:

What happens if there is no attribute present?

If there is no attribute something present, then the if-clause already evaluates to true and the expression @something!=’hidden’ does not have to be evaluated. Thanks for contributing an answer to Stack Overflow!