Parent: $root.$constants
| kIconOnLeft | Node icons are draw on the far left |
| kIconOnNode | Node icons are always next to node name |
| kIconSystemSet | Tree list node icons are positioned depending on the operating system |
| kNodeIconFixed | The node icon is always shown using a fixed iconid with no mode |
| kNodeIconLinkExpand | The node icon is linked to the expand/collapse state of the node |
| kNodeIconLinkLine | The node icon is linked to the current tree line |
| kTreeDataFlatList | The data for the tree is represented by a flat list |
| kTreeDataFlatListWithTags | The data for the tree is represented by a flat list with a column for tag values |
| kTreeDataXMLIds | The data for the tree is represented by a list containing the names of XML elements and attributes,and their ids |
| kTreeDataXMLPaths | The data for the tree is represented by a list containing XML element and attribute paths |
| kTreeDataXMLSaveTree | The data for the tree is in the format generated by the $savetree method of the Omnis XML object |