Describing Module Encapsulation
Terraform modules encapsulate their resources, and dependencies can only be expressed through outputs, which wasn't clear to me in the existing documentation. I'm hoping a small change will make that more explicit.
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## Outputs
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Modules can also specify their own [outputs](/docs/configuration/outputs.html). These outputs can be referenced in other places in your configuration, for example:
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Modules encapsulate their resources. A resource in one module cannot directly depend on resources or attributes in other modules, unless those are exported through [outputs](/docs/configuration/outputs.html). These outputs can be referenced in other places in your configuration, for example:
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```hcl
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resource "aws_instance" "client" {
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