Setting up a Reference Datum

For an element to be used as a reference datum, it must have:

• An origin.

• An SKEY attribute, or a parent with an SKEY attribute.

The elements the user can set up as reference datums are:

• Datums

• Equipment

• Equipment and structural primitives such as boxes

• Sections

• Piping components

• Point elements, if they have a parent with an SKEY attribute