Create a d:error element, used in validation reports. See http://code.google.com/p/daisy-pipeline/wiki/ValidationReportXML
| Port | Description |
| result primary |
| Local Name | Namespace URI | Default | Description |
| error-type | '' | Type of error. |
|
| location-href | '' | The file containing a reference to this error. |
|
| file-href required | The file where the error itself is. |
||
| desc | '' | A description of the error. |