For some reason I can never remember the syntax to refer to an Internet Draft in a draft. I wrote up a note somewhere, but I've managed to lose it!

First, add the include: ?rfc include='reference.I-D.ietf-dnsop-sutld-ps-04.xml'  This includes "draft-", the version and .xml

NOTE: Leave draft- off when referencing a generic draft name, and add draft- when referencing a specific version of an internet-draft.

Next, add the refernce: target="I-D.ietf-dnsop-sutld-ps" This does not have the "draft-", the version and .xml. The refernce anchor can also be found by looking in the refernce itself (e.g:

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