[fix] thumbnail element

readme.md

@@ -13,16 +13,20 @@ Tested against BaseX 8.6.2
 import module namespace t="expkg-zone58:image.thumbnailator";
 
 fetch:binary("http://images.metmuseum.org/CRDImages/ep/original/DT46.jpg")
-=>t:scale(80,60)
+=>t:size(80,60)
 
 ```
 
 ### Tasks
 This function takes an XML description of the operations to apply to generate the thumbnail.
 
-```xml
+```xquery
+import module namespace t="expkg-zone58:image.thumbnailator";
+declare variable $watermark:="C:\Users\andy\git\ex-thumbnailator\src\test\resources\icon.jpg";
+
+let $task:=
 <thumbnail>
-    <size width="500" height="500"/>
+    <size width="100" height="100"/>
     <filters>             
         <colorize color="green" alpha=".5"/>      
         <caption position="CENTER">Some Text here</caption>
@@ -31,8 +35,11 @@ This function takes an XML description of the operations to apply to generate th
         <watermark src="{$watermark}" alpha=".5"  position="TOP_LEFT"/>  
     </filters>         
 </thumbnail>
+
+return fetch:binary("http://images.metmuseum.org/CRDImages/ep/original/DT46.jpg")
+=>t:task($task)
 ```
-A schema is provided.
+A schema for this is [provided](./src/content/task.xsd)
 
 ## Installation
 The library is packaged in the [EXpath](http://expath.org/spec/pkg) xar format with