AutoCAD calls these "points", but they aren't, so I'm suggesting that rhizopod calls them "marks" because they can be reformatted into multiple marker styles. --- # ./model/<ID>.yml # mark entity ID: int points: - - x (float) - y (float) - z (float) (optional) layer: ID ref mark_style: ID ref object_style: ID ref type: mark color: '#ffffff', bystyle linetype: [dash, space], bystyle normal: # (optional) (defaults to 0,0,1) - - x (float) - y (float) - z (float) I've purposefully left-out the "units:" attribute. I'm thinking "one drawing", "one coordinate system". --Eric -- "You can't win. You can't break even. You can't quit." --Ginsberg's Restatement of the Three Laws of Thermodynamics