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### Appending or Overwriting

If the target file exists, there are two options: the existing file can be replaced, or records can be appended to the existing content. Appending or replacing is configured with 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`.

Append is available in the following Writers:

CloverDataWriter
FlatFileWriter
StructuredDataWriter
Trash (the Debug append attribute)
XMLWriter

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