Scope

A scope is a specific area of code that is partially isolated from other areas of code.

Scopes limit the reach of:

Scopes do not limit the reach of:

Resource titles, which are all global.
Resource references, which can refer to a resource declared in any scope.

Diagram showing areas that represent scopes. Top scope contains
node scope, which in turn contains three local scopes, called example::parent, example::other, and example::four. The example::parent class scope contains a class
scope called example::child. The relationships formed by these scopes is described in the
following text.

A particular scope has access to its own contents, and also receives additional contents from its parent scope, node scope, and top scope. The rules for how Puppet determines a local scope’s parent are described in scope lookup rules.

In the diagram above:

Top scope can access variables and defaults only from its own scope.
Node scope can access variables and defaults from its own scope and top scope.
Each of the example::parent, example::other, and example::four classes can access variables and defaults from their own scope, node scope, and top scope.
The example::child class can access variables and defaults from its own scope, the example::parent scope, node scope, and top scope.

Scope

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