Odd validation messages

[maglid]

Using version 18.1.
My map called top-level.ditamap references topics and a map of key definitions:

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<map>

 <title>My Guide</title> 

 <topicref href="topic1.xml" />

 <topicref href="topic2.xml" />

 <mapref href="keydefs.ditamap" format="ditamap"/>

</map>

keydefs.ditamap is like a variable file with thousands of keydefs like this:

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<keydef href="incompatible_changes.xml" keys="incompatible_changes"/>

These keys are referred to in the topics like this:

See <xref keyref="incompatible_changes"/> for the procedure...

When I use Oxygen to validate top-level.ditamap, I get thousands of notices like this one:

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Reference  W [REF] Topic "impala_incompatible_changes.xml" is referenced in the DITA map as "resource-only". Any cross reference to it will result in a broken link.

Can I turn off these warnings? Or is there some legitimate error that I am missing?

Thanks,
Mark

[Radu]

Hi Mark,

Once a topic is referenced as resource-only in the DITA Map it will no longer be present in the PDF output. So as a result all links to it will be broken.
This is why we report the problem and right now we do not have a setting to control this.
Usually resource-only topics should only be used for content references, links should always be made to topics which are referenced with normal processing somewhere in the DITA Map.

Regards,
Radu