u201d more specifically in the artist relationship table 183 the id of an artist having an relationship with an artist having the u201c id of artist a u201d is u201c id of artist b u201d and the ids of artists having an relationship with an artist having the u201c id of artist b u201d are u201c id of artist c u201d and u201c id of artist d u201d also the id of an artist having an relationship with an artist having the u201c id of artist c u201d is u201c id of artist g u201d the id of an artist having an relationship with an artist having the u201c id of artist d u201d is u201c id of artist a u201d and the id of an artist having an relationship with an artist having the u201c id of artist e u201d is u201c id of artist c u201d note that a degree of the relationship among the artists may be stored for each of them next there will be explained with reference to a flow diagram in fig8 example operations made in the content providing system in fig1 with which the pc 1 acquires a content file from the content server 3 and records it into the pd 5 for example the user having the pd.