What is the procedure for creating a Drools query for "siblings"?

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To create a Drools query for "siblings", you can follow the following procedure:

1. Define your data model: Define your data model and the attributes that you need to identify siblings. For example, you might have a class called Person with attributes such as name, age, and parent.

2. Write a rule template: Write a rule template that defines the conditions for identifying siblings. For example, you might define siblings as two people who have the same parent.

3. Define the query: Use the rule template to define the query. In Drools, queries are defined using the query keyword, followed by the name of the query and the rule template. For example:

query findSiblings $parent: Person($name: name) Person(parent == $parent, name != $name) end

This query finds all pairs of people who have the same parent but different names, which identifies them as siblings.

1. Call the query: Once you have defined the query, you can call it from your Drools application using the name of the query. The result of the query will be a collection of objects that match the conditions defined in the rule template.

Note: This is just an example. Depending on your data model and requirements, you may need to modify the rule template and query accordingly.