content_image/986560.jpg
## 9.13 Validation setup 

4. The rules then need to be added to the DCO, as shown in Figure 9-47, using the approaches described earlier in this chapter. 

<img src='content_image/986560.jpg'>

5. Save and publish the Signature Ruleset created using the approaches used earlier in this chapter. 

6. Save and unlock the DCO. 

7. Close DStudio. 

Example B-1 on page 602 provides the source code for the Signature script. 

To ensure the quality of the data that we captured, we can apply validation routines on a field-by-field level. Validation can be as simple as defining the length of a field and the type of characters allowed, or it can involve more complex validations against database values. 

