Sunita, This paper involves a dose of both measure theory and functional analysis both of which I studied 40 years ago. I suggest that you contact Billard directly:
You can Find answer with explanation and also future queries in given books:
There are three main textbooks: ##Bock, H.H., Diday, E. (2000) Analysis of Symbolic Data, Exploratory methods for extracting statistical information from complex data. Studies in Classification, Data Analysis and Knowledge Organisation, Springer-Verlag. ##Symbolic Data Analysis and the SODAS Software, Edwin Diday (Editor), Monique Noirhomme-Fraiture (Editor) , wiley 2008.