Attributes don't inherit the default namespace

instant-xml-macros/src/de.rs

@@ -338,6 +338,7 @@ fn named_field(
     let field_name = field.ident.as_ref().unwrap();
     let field_tag = field_meta.tag;
     let default_ns = match &field_meta.ns.uri {
+        None if field_meta.attribute => &None,
         None => &container_meta.ns.uri,
         _ => &field_meta.ns.uri,
     };

instant-xml/src/de.rs

@@ -156,7 +156,7 @@ impl<'xml> Context<'xml> {
                 Some(ns) => self
                     .lookup(ns)
                     .ok_or_else(|| Error::UnknownPrefix(ns.to_owned()))?,
-                None => self.default_ns(),
+                None => "",
             },
             name: attr.local,
         })