With Code Completion being one of the key features of PhpStorm, the plugin provides several possibilities to complete keywords, predefined functions, variables and parameters used in XPath expressions, template names and names of parameters that can be passed to a template invocation.
Completion in XPath Expressions
It's possible to complete all parameters/variables in scope inside an XPath expression in a normal expression attribute or inside an attribute value template
Also, all predefined functions and keywords are available for completion, including function signatures.
The Quick Documentation Lookup also works in completion lookup lists.
Completion for Template Names in Xsl:Call-Template
The template's name that is to be called can be completed from a list of all named templates in the current document and included Style Sheets.
Completion for Template Parameters
There's a special completion for parameters that should be passed to a template in a
xsl:call-template invocation. The completion lists all parameters that are declared by the template and are not yet present in the argument list of the invocation, i.e. there's no