Chained parameter in CapabilityStatement

Hello,

Where do we express the support of a chained parameter in the CapabilityStatement resource?
Example: We can search DocumentReferences using author:Practitioner.name.

Thx

The SearchParameter.chain element allows you to indicate what chaining is permitted. Typically the CapabilityStatement will reference locally defined SearchParameter instances that are ‘derivedFrom’ standard SearchParameters. The locally-defined (possibly even ‘contained’) SearchParameters will identify the specific local capabilities.

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