Attachment

Hi. I'm working on the phpbb2drupal module which makes good use of this filter. One thing that dosn't seem to be implemented is inline attachments.

This would be something like

  [attachment=0]my_attachment.gif[/attachment]

this would reference an field_attachment field on the same node/comment.

Is this something that would fit in this module, or should I create a separate filter for this case?