Silly Question NO5:

[lechael]

There is a <wb:case> in "action-class", what are the two values it compares with  ? here, it inserts a node: <wd:action/>, which has a namespace of "wd" where is this node inserted, what does the following <wb:struct> do?     <wb:class id="action-class">     <wb:case id="action" path=".">       <wb:insert-node>         <wd:action/>       </wb:insert-node>       <wb:struct id="action" path="wd:action">         <wb:value id="label" path="wd:label"/>         <wb:value id="id" path="@id"/>       </wb:struct>     </wb:case>   </wb:class>