The attribute axis is used to select the attribute nodes associated with an element node.
If the context node is an element node, the location paths
attribute::* or @*
will each return all the attribute nodes associated with that element node.
To select a specific attribute node named security, you write either
attribute::security
or
@security
@ is an abbreviation for the attribute axis.
If the context node is not an element node, the attribute axis returns an empty node-set.