A data display apparatus and data display method for displaying relationships
between
sets of data are described. Sets of data and similarity values representing similarities
between the sets of data are received, and a display is controlled to display representations
for the sets of data separated in accordance with the similarity values and so
as to display, in a first style, links between representations which correspond
to sets of data having a strong similarity value and, in a second style, links
between the representations which correspond to sets of data having a weak similarity value.