Updating Existing Business Rules
You can update existing rules by adding the updateIfExists attribute to the business rules rule sets load files and setting the value of the attribute to true. If the attribute is not in the load file or the attribute is set to false, you cannot update existing rules and you get an error when you attempt to reload the load files.
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Because the key and context creates the BusinessRule object uniqueness, you cannot update both even if the updateIfExists attribute is set to true.
Here is an example of how to enable updating:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE BusinessRule SYSTEM "standardX20.dtd">
<BusinessRule>
...
<updateIfExists>true</updateIfExists>
...
</BusinessRule>
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