XPath within R using XML package

Question

I am new to XPath, but I can see how powerful it is. I am looking at the source code of this link and simply want to extract the contents and username from the following tw

Answer 1

You're close. This should do it.

//head/meta[@name=\"description\"]/@content

The brackets are constraining the choice of meta tags, but you still have to specify the attribute you want.