Hi,

When referenced in a property, a property qualifier determines the appearance and allowable values of a portion of the property value.

A property qualifier rule is an instance of the Rule-Obj-Property-Qualifier rule type.

A property qualifier rule can supplement information in a property with additional capabilities or restrictions. Property qualifier rules are referenced in a property in the AnchorProperty Qualifiers section of the property's Advanced tab.

For example, the pyDecimalPrecision property qualifier rule affects how the system rounds arithmetic computations that involve the properties that reference it.

Access

Use the Records Explorer to list all property qualifier rules available to you.

Category

Property qualifier rules are part of the Data Model category. A property qualifier rule is an instance of the Rule-Obj-Property-Qualifier rule type.

For more details
https://community.pega.com/sites/default/files/help_v731/procomhelpmain.htm

Thank You