Help with Tip Dates Estimate

[Jonas Burkhard]

Dear all,

I am trying to use BEAST to experiment with humanistic data. I have converted this data into "morphological data" in the below format. I have enabled the relevant MM package in BEAST. 

BEGIN DATA; 

DIMENSIONS NTAX=78 NCHAR=24; 

FORMAT DATATYPE=STANDARD MISSING=? GAP=- SYMBOLS="0123456789"; 

; 

MATRIX 

111 150212200050302101000010 

112 025010021000021100101120 

113 030010021000011102001050 

...

; 

END;

This data uploads into BEAUTi well. My issue now is that while for some taxons I have a trusted tip date, for most I do not. How can I use the tip data I do have while getting estimates for the rest? Can I simply enter known tip dates (in my case, years) when I do have them in the "tip dates" tab, while leaving the value for those to be estimated as "0", as in the attached screenshot? I expect all my tips to fall in the range 1400-1800, and "uniform" distribution is what I want. 

I have experimented setting up priors and parameters in the xml file directly but due to my limited experience this is proving very finicky. Any simple solutions are greatly appreciated!