the records can be appended to the existing content.
Appending or replacing is configured with the Append attribute.
If Append is set to true, records are appended to the file.
If Append is set to false,the file is overwritten. The default value is false.
You can also append data to files in local (non-remote) zip archives. In server environment, this means use_local_context_url has to be set to true.