I'm using a base tag so that links resolve correctly. However this means links to the source page or fragment links such as "#xyz" are resolving as internal pdf links. I want them to all be web links. I tried prince-pdf-link-type, but that seemed to cause Prince to ignore the base tag. Is it possible to have a base url and make all links be web links?

Tricky. We might need to revisit the behaviour of prince-pdf-link-type, as ignoring the base URL doesn't seem so sensible any more. I'm not sure if there is any workaround for this in the meantime.