It appears to be standard RDAP practice when returning result sets for domain, nameserver and entity searches to give only summary data for each result item. Any information that can be gleaned from the object itself is included, but related resources are not included. For a domain, for instance, the domain information is included, but nameservers, entities and events (which come from history entries) are suppressed. In their place, there is a standard boilerplate remark in the object indicating that only summary data is included, and that the user should query the item directly to get the full data. Note that summary data is used only for searches; direct queries for an item will still return full data.
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