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Each Compliance rule can be augmented with additional rule metadata through the use of Attributes and Tags, each of which is described here.

Rule Tags

Each MettleCI Compliance rule can include extra metadata using a set of user-specified values which are referred to as ‘tags’. Each Compliance rule may specify zero or more ‘tags’ which are free-form text labels associated with each rule.

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The example CI/CD build pipelines that ship with MettleCI demonstrate the use of tags to identify which rules inhibit the successful completion of CI.

Rule Attributes

Here’s an example of a rule definition which incorporates some Tags.

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Info

If you add a @Tag attribute to a rule you must also add a package value to the top of your Compliance rule. This is required by the technology underlying Compliance, and has no other functional implications. A good practice for the package name is to use a unique identifier which identifies the group assuming ownership (and responsibility for maintenance) of the rule. All out-of-the-box rules have a package name of ‘Data Migrators’, for example.

Include and Exclude options for Compliance operations

The various MettleCI tools which use the Compliance Rule library permit the filtering of the rules which they use by ‘positive’ and 'negative' tag inclusion.

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