R help - Jul 2017 - Extract XMLAtrributeValue

Hi,

I am trying to extract an attribute value which is like this.

(e.g) class="whQuestion"

The 'extract' function prints this. But I am not sure how to get
"whQuestion" from that. The type of 'x' in extract
is "character"

[1] "XMLAttributeValue"
       class
"whQuestion"
attr(,"class")

extract <- function(x){
print(x)
}

filteredclasses <-
function(){
classes <- xpathSApply(doc = posts, path = "/*/Posts/Post/@class",
extract)
}

Thanks,
Mohan
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