Trouble with the data in exported file from Tecplot
 

Dear All,
I have a trouble with the data in exported file from Tecplot. Could you help me in my case?
My work is related to tidal turbine, I would like to combine turbine structure and flow field data in Teclpot in order to visualize the wake and flow field behind the turbine. I can do this by import the data of structure and field into Tecplot one by one. However, in the next step when I try to export the combined data in the form of DAT file, the file contains some information which I can not understand such as: "Node UserID"; "Element UserID"; "Material ID"; "Part ID"; "Property ID". I already have read ASCII Data in tecplot dat format, but I found nothing. Could you please help me by explaining the meaning of those data? Thank you so much.