Using mapping, you can place Plant 3D objects in your model with all P&ID property value information intact. If the mapped properties are not part of a tag format, the match is straightforward. If, however, the mapped properties are included in the P&ID tag, these properties must also be included in the Plant 3D tag.
During validation, if a P&ID object and a Plant 3D object have the same tag values, the objects are considered equivalent. If the tag values are not the same, the objects cannot be evaluated during a validation check. If the tags match, other comparison tests can take place (matching type, matching line, and so on).
Here is an example of tag equivalence:
Make sure to map every property that you use as a subpart of a P&ID tag format. Otherwise, the value is not copied when you place the Plant 3D object in the model.
For example, if you have a P&ID object with a tag format that includes manufacturer, color, and supplier, but supplier is unmapped, only the values for manufacturer and color are included in the model. A question mark appears in the Plant 3D tag. Thus, the tags do not match and the objects are not compared during validation.
If you change a default mapping or set up a new mapping, make sure that associated tag formats match.