You can perform three types of publishing: Simple, Complex, or Flatten. You select the type of publishing you want to perform from the Type Group in the Publishing Menu. See Type Group.
Simple Publish Hard commits (renders) all effects and transitions and creates a continuous file sequence in the destination folder.
Complex Publish Creates a file sequence for each segment of the clip and copies the source media to the destination folder. Soft effects and transitions are not committed for the clip or for the sequence of files.
Select Complex Publish when you want to share source media with another application for dust busting or colour correction, for example. When the source files are saved by the other application, the published clip is updated with the new media to which you can appy effects and transitions.
Flatten Publish Flattens the media into a single video layer. All effects such as wipes and timewarps are committed. Dissolves and cuts are not committed. An EDL file is published at the destination directory, named <clip_name>.edl. The EDL is a modified CMX 3600 EDL containing DLEDL flags. The EDL includes information for all the segments in a clip, including the head and tail information for dissolve and cut events and DLEDM comments. To render dissolves and transitions, use the EDL.