// Copyright 2017 the original author or authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
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// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
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[[rule_source]]
== Implementing model rules in a plugin

A plugin can define rules by extending api:org.gradle.model.RuleSource[] and adding methods that define the rules. The plugin class can either extend api:org.gradle.model.RuleSource[] directly or can implement api:org.gradle.api.Plugin[] and include a nested api:org.gradle.model.RuleSource[] subclass.

Refer to the API docs for api:org.gradle.model.RuleSource[] for more details.


[[sec:applying_additional_rules]]
=== Applying additional rules

A rule method annotated with api:org.gradle.model.Rules[] can apply a api:org.gradle.model.RuleSource[] to a target model element.
