# Custom XML Namespaces

> Review the custom XML namespaces that route edit/delete XMPP requests to Vivox handlers.

These are custom XML namespaces to route edit/delete XMPP requests to Vivox handlers.

| Namespace                 | Description                                                              |
| ------------------------- | ------------------------------------------------------------------------ |
| urn:vivox:message-edited  | Custom message element sent from the server to indicate edited message.  |
| urn:vivox:message-deleted | Custom message element sent from the server to indicate deleted message. |