XSLT if expression syntax, combining more than one expression

xml, xpath, xslt

Solution

The conditional statement `xsl:if` for starters needs an `xsl:template` or other xsl element as parent. The syntax will become similar to the following:

<xsl:template>
    ... preliminary xsl statements ...
    <xsl:if test="Number != '' and (Name != '' or PreferredName != '')">
        ... further xsl statements (the code you were referring to ...
    </xsl:if>
    ... other xsl stataments ...
</xsl:template>

Further advise: study xslt usage, in particular templates and their application (and sort of automatic looping).

Problem

Trying to combine an if statement using `<xsl:if test="expression">` where I want to have multiple expressions together, to do order of operations such as this psuedocode: ``` if (Number != '' and (Name != '' or PreferredName != '')) {// code here} ``` Essentially I want to do this in an `<xsl:if>`: ``` <xsl:if text="Number != '' and (Name != '' or PreferredName != '')"> ``` but I'm not sure of the `expression` syntax, I don't think I can do the `()` like that, as I haven't seen it anywhere. I couldn't find the expression syntax on the web easily, it may be XPath, but I'm not sure if XPath supports `()` to group expressions. I'm not an expert on XSL/XML/XSD's' so I don't know if the expression is even XPath, or what. I'd rather not do nested `<xsl:if>` statements if possible, and want to stick with `<xsl:if>` not `<xsl:choose>`. I'm sure this is probably a simple answer, but kind of stuck here. Thanks.

Original source