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Document when environment variable property mapping applies 

Closes gh-41877
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Andy Wilkinson 2024-08-19 17:51:11 +01:00
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commit f4b73da657
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spring-boot-project/spring-boot-docs/src/docs/asciidoc/features/external-config.adoc
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@ -938,9 +938,9 @@ For example, the configuration property `spring.main.log-startup-info` would be
Environment variables can also be used when binding to object lists.
To bind to a `List`, the element number should be surrounded with underscores in the variable name.
For example, the configuration property `my.service[0].other` would use an environment variable named `MY_SERVICE_0_OTHER`.
Support for binding from environment variables is applied to the `systemEnvironment` property source and to any additional property source whose name ends with `-systemEnvironment`.
[[features.external-config.typesafe-configuration-properties.relaxed-binding.caching]]