"I considered learning HTML directly from the w3c
specifications." - Make sure you arrange for your friends to visit
you before they take you away! Try www.w3schools.com.
At the time of import RH is only seeing one document so the
links between documents will be lost.
When you create a link in RH HTML using the Hyperlink icon,
the dialog has various options on how the topic opens. What you see
there is what is available.
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