Translations:Frequently asked questions/100/en


 * Know that sketches are highly sensible to the problem. Referencing a specific edge of a sketch, or a face of an object built on a sketch, such as a PartDesign Pad, is dangerous, unless you are pretty confident that these sketches will not change sensibly over time or the sketch is very simple. A Pad built on a simple rectangular sketch, for example, will likely be safe as it will generate only one face, so there is no order problem.
 * Prefer other kinds of objects such as Part or Draft when possible. These objects are always built the same way, and therefore their geometric components usually follow the same order each time they are rebuilt. They are much more stable to toponaming problems.
 * To attach further objects onto the faces of sketch-based geometry, prefer using Datum geometry. These invisible "helper objects" don't depend on sketch geometry, and therefore stay stable over time.