| Interface | Description | 
|---|---|
| Sequencer | 
 Sequencer used to determine the node sequence within a layer. 
 | 
| Class | Description | 
|---|---|
| NameSequencer | 
 Alphanumeric sequencer. 
 | 
| NumberingSequencer | 
 Sorts by numbering ID. 
 | 
| SequencerHolder | 
 Holds all layout sequencers. 
 | 
| UnspecifiedSequencer | 
 An empty sequencer. 
 |