Using xpath_query with xpath_variable_set

[CisimEjirtimid]

Hello, I'm having an issue with using xpath_query with the query being something along the lines of
//node[@$attributeName = $attributeValue]
with attributeName and attributeValue being variables I want to parametrize through use of xpath_variable_set.
But when I set both variables to be of string type, I only get an exception saying that it's Unrecognized node test.
What am I missing here?

[zeux]

Variables can't be used in @-tests. You're looking for something like //node[attribute::*[name() = $attributeName and value() = $attributeValue]]

[CisimEjirtimid]

Hey, thanks for quick response!
The solution ended up being a bit different, but you certainly helped me with correctly setting up the query.
Anyway, the right query is //node[@*[name() = $attributeName] = $attributeValue].

Thank you once more!