def METHOD_NAME(self, content):
    """
    Append attribute nodes into L{Content.data}.
    Attributes in the I{schema} or I{xml} namespaces are skipped.
    @param content: The current content being unmarshalled.
    @type content: L{Content}
    """
    attributes = AttrList(content.node.attributes)
    for attr in attributes.real():
        name = attr.name
        value = attr.value
        self.append_attribute(name, value, content)