List:after { attr1=search1 } { ... } # insert a node after a found node
List:before { attr1=search1 } { ... } # insert a node before a found node
List:copy { attr1=search1 } { ... } # duplicate a node and edit the copy
+ List:reset { attr=value1; ... } # equivalent to :clear and :append
You can specify several attributes in the search condition and the nodes
are tested for equality in all these attributes. In the editing