## VW Messprinzipien - Feature Definition area

Use the Feature Definition area in the VW Messprinzipien dialog box to define the features for the method you are measuring.

1. Select a measuring method. For help, see Creating a VWMP Command.

2. Complete the options in the Feature Definition area for the measuring method you selected.

- For hole (loch) or standard part measuring methods, these options appear:

Feature Definition area for hole (loch) or standard part measuring methods

Item | Description
Round hole CA area | Use the options in this area to define the measuring method.

- ID box: The ID of the feature. You can change the ID.

- X, Y, Z, RT, and D boxes: Enter the nominals, feature vectors, and report vector RTs for the X, Y, Z, RT, and D axes.

- Flip RT Vector icon: Click this icon to flip the report vector.

- Reset RT Vector icon: Click this icon to reset the report vector to the feature vector.

- Normalize RT Vector icon: Click this icon to normalize the report vector.

- +Tol drop-down list: Select the upper tolerance for the dimension axis.

- -Tol drop-down list: Select the lower tolerance for the dimension axis.

- Comments box: Enter the tolerances.

- E-Rule drop-down list: Select the evaluation rule, which defines the mandatory axis for the output. The option you select becomes part of the ID. You can select the remaining checkable axes for output.

- T-Rule drop-down list: Enables you to save and recall tolerances for all of the available axes.

- For contour (kontur) measuring methods, these options appear:

Feature Definition area for contour (kontur) measuring methods

Item | Description
Feature ID box | The ID of the feature.
Desired Points area | Use the options in this area to define the measuring method.

- Skip check box: Select this check box to ship the point if is optional.

- ID box: The ID of the point. The ID of the dimension appears underneath this box.

- Center box: The point centers of the X, Y, and Z axes.

- Vector box: The point vectors of the I, J, and K axes.

- RT box: The point report vector RTs of the I, J, and K axes.

- Flip RT Vector icon: Click this icon to flip the report vector.

- Reset RT Vector icon: Click this icon to reset the report vector to the feature vector.

- Normalize RT Vector icon: Click this icon to normalize the report vector.

- +Tol drop-down list: Select the upper tolerance for the dimension axis.

- -Tol drop-down list: Select the lower tolerance for the dimension axis.

- Comments box: Enter a comment about the tolerance.

- E-Rule drop-down list: Select the evaluation rule, which defines the mandatory axis for the output. The option you select becomes part of the ID. You can select the remaining checkable axes for output.

- T-Rule drop-down list: Enter a T-Rule name. The following options appear:

To save the tolerances, select Save Item. To delete an existing T-Rule, select Delete Item.

The Edit window appears as follows: