diff --git a/README.md b/README.md
index 43a0cfa9f..6fa071867 100644
--- a/README.md
+++ b/README.md
@@ -52,20 +52,18 @@ Copy `drivers/chrome/_locales/en`.
 	"headers":    { "X-Powered-By": "Application Name" },
 	"url":        ".+\\.application-name\\.com",
 	"html":       "<link[^>]application-name\\.css", 
-	"meta":       { "generator": "Application Name" },
-	"script":     "application-name\\.js",
+	"meta":       { "generator": [ "Application Name", "Alternative Application Name" ] },
+	"script":     "application-name-([0-9.]+)\\.js\\;confidence:100\\;version:\\1",
 	"env":        "ApplicationName",
 	"implies":    [ "PHP" ],
-	"confidence": { "html": 50, "script": 50 }
 	}
 ```
 
 ### JSON fields
 
 field      | type   | description
------------|--------|-----------------------
+-----------|--------|------------
 cats       | array  | List of category IDs. See [apps.json](https://github.com/ElbertF/Wappalyzer/blob/master/share/apps.json) for the complete list.
-confidence | object | Indicates less reliable patterns that may cause false positives. The aim is to achieve a combined confidence of 100%. Defaults to 100% for unspecified fields.
 env        | string | Global JavaScript variables, e.g. `jQuery`.
 headers    | object | HTTP Response headers, e.g. `X-Powered-By`.
 html       | string | Full HTML response body.
@@ -76,6 +74,31 @@ script     | string | `src` attribute of HTML script tags, e.g. `jquery.js`.
 
 Except `cats`, all fields are optional.
 
+Except `cats` and `implied` all fields except one or more patterns (either a string or an array of regular expressions).
+
+
+### Patterns
+
+Patterns are case insensitive [regular expressions](https://developer.mozilla.org/en-US/docs/JavaScript/Guide/Regular_Expressions). No surrounding delimiters or flags are used.
+
+Optional fields can be added, separated by `\\;`:
+
+field      | description
+-----------|------------
+confidence | Indicates less reliable patterns that may cause false positives. The aim is to achieve a combined confidence of 100%. Defaults to 100% for unspecified fields.
+version    | Gets the version number from a pattern match using a special syntax.
+
+
+#### Version syntax
+
+example    | description
+-----------|------------
+`\\1`      | Returns the first match
+`\\1?a:`   | Returns `a` if the first match contains a value, nothing otherwise
+`\\1?a:b`  | Returns `a` if the first match contains a value, `b` otherwise
+`\\1?:b`   | Returns nothing if the first match contains a value, `b` otherwise
+`foo\\1`   | Returns `foo` with the first match appended.
+
 
 ## Drivers
 
@@ -171,4 +194,4 @@ https://github.com/skroutz/wappalyzer-ruby
 
 Wappalyzer on Firefox:
 
-![A screenshot of Wappalyzer on Firefox](http://wappalyzer.com/sites/default/themes/wappalyzer/images/installed.png)
\ No newline at end of file
+![A screenshot of Wappalyzer on Firefox](http://wappalyzer.com/sites/default/themes/wappalyzer/images/installed.png)