I have a test step of type http request and want now to extract from the resulting response an html value.
Therefore I have created another test step of type "Property Transfer" which contains an XPATH query that I have tested with another tool, so the XPath is ok. Furthermore I have validated the html response which also seems to be valid xml (although the document starts with <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> which is an unclosed tag)
So, my question is: Is it possible to do a a property transfer from an html response using xpath?
Yes, you should be able to. I'm able to using ReadyAPI 3.0.0 and its SoapUI Pro module. It's my limited understanding that, in the background, SoapUI makes available HTML content in a useable form of XML I briefly tried to locate the Smartbear website where it lightly mentions this. I hope this helps and someone is able to descriibe SoapUI Pro's treatment of HTML in more detail.