Given a list of files, ensure that each exists and is well-formed XML.
| Port | Description |
| source.fileset primary | Input fileset |
| source.in-memory sequence |
| Port | Description |
| result.fileset | Output fileset which contains the well-formed files from |
| result.in-memory sequence | |
| report | List of malformed files, formatted as |
| validation-status | Validation status (http://daisy.github.io/pipeline/StatusXML) of the file check. |