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Madonna
electronic
pop
User 1
folk
Moby
User 2
Morchee
ba
chillout
rock
User 3
(a) Users with distinct pro
Madonna
electronic
pop
Moby
User 1
electronic
Morcheeba
folk
Moby
User 2
chillout
Morcheeba
rock
Moby
User 3
(b) Users with overlapping pro
Fig. 7.8
Simplified visualization of the initial cold start problem.
a
Before the enrichment, there
is no overlap between the different user profiles and collaborative filtering is not possible.
b
After
enrichment, the user profiles overlap and collaborative filtering is possible
Entity 2 Set
Entity 1 Set
relation
relation
liked/rated
Entity 3 Set
relation
User
Entity 4 Set
Fig. 7.9
The semantic dataset with generic information and user profiles linked to it
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