In this case there will be enough to add the anchor
<span id="Kdenlive on other Desktops and Operating Systems">
The general concern is that links should refer to Kdenlive/Manual/KdenliveOnOtherPlatforms#Kdenlive on other Desktops and Operating Systems
This method can be used to avoid renaming Amarok pages.
I know Claus has been talking to you about various such concerns, and that he is building it into Draft:The KDE Documentation Primer. I'm picking up bits as I go along, and when your conversations are finished we should have the ability to generate DocBooks without too much effort - the aim is to have them at the point where they compile every time without needing extra work. Please carry on working with Claus on this, and meanwhile, make any changes you need. I'll learn the needs as quickly as I can