app/models/agents/website_agent.rb

@@ -31,7 +31,9 @@ module Agents

                             "body_text": { "css": "div.main", "value": ".//text()" }
              

                           }
              

                 
              

                -      "@_attr_" is the XPath expression to extract the value of an attribute named _attr_ from a node, and ".//text()" is to extract all the enclosed texts.  You can also use [XPath functions](http://www.w3.org/TR/xpath/#section-String-Functions) like `normalize-space` to strip and squeeze whitespace, `substring-after` to extract part of a text, and `translate` to remove comma from a formatted number, etc.  Note that these functions take a string, not a node set, so what you may think would be written as `normalize-space(.//text())` should actually be `normalize-space(.)`.
              

                +      "@_attr_" is the XPath expression to extract the value of an attribute named _attr_ from a node, and ".//text()" is to extract all the enclosed texts. To extract the innerHTML, use "./node()"; and to extract the outer HTML, use  ".". 
              

                +
              

                +      You can also use [XPath functions](http://www.w3.org/TR/xpath/#section-String-Functions) like `normalize-space` to strip and squeeze whitespace, `substring-after` to extract part of a text, and `translate` to remove comma from a formatted number, etc.  Note that these functions take a string, not a node set, so what you may think would be written as `normalize-space(.//text())` should actually be `normalize-space(.)`.
              

                 
              

                       Beware that when parsing an XML document (i.e. `type` is `xml`) using `xpath` expressions all namespaces are stripped from the document unless a toplevel option `use_namespaces` is set to true.