Hi Tom,
As far as I understand there are diffrent ways to use it very well
explained there:
http://www.statmt.org/moses/?n=Moses.AdvancedFeatures#ntoc11
Now ansering your questions,

I have two questions about how the -xml-input entries in the markup tag
> work.
>
>    1. Are the entries applied before the distortion table with the
>    distortion table affecting the result, or are the entries applied as a net
>    effect after the distortion table?
>
> To me, it is another kind of decoding process, especially when the switch
and the option "exclusive" are used. They seem to bypass completely the
decoding process which uses the phrase-table and the distortion model.
If you want to simply add a new translation hypothesis which does not
already exist in your phrase table, use the "inclusive" option instead of
"exclusive". Both processes will be use at the same time.
But you will have no guaranty that your translation hypothesis, proposed
with the xml-markup switch, is the one chosen by the decoder.
As far as I know, the probability you gave in the xml tag correspond
jointly to all the features and weights associated to the hypothesis.

>
>    1. Do the entries override or supplement the weightings in the loaded
>    SMT model's t-table/distortion table combination?
>
> As I said, as far as I know, the exclusive mode, simply override the
phrase-table and the distortion model, if you still want use them, you can
use the mode "inclusive" for example.

Best,

Christophe
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