There is missing how to use security properties as replacement to vault expressions.

Migration Guide [1]
7.2.1. Migrate Vaults to Secure Credential Storage

Note
If you previously used vault expressions to parameterize nonsensitive data, it is recommended that you replace the data with Elytron security properties.

There is missing how to use security properties as replacement to vault expressions.
I expect to have there some examples: first one with vault expression and second one where is used security property instead of vault expression.

[1] https://access.qa.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/7.1.beta/html-single/migration_guide/#migrate-to-elytron