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non-overlap region lower the similarity; formula [2.6] is applied when Q is contained
within D
f
.
O
Q+D
f
Similarity(D
f
,Q)=2·
[2.3]
Similarity(D
f
,Q)=
D
f
Q
[2.4]
(O∩Q)%
¬(O ∩ Q)% + 100
Similarity(D
f
,Q)=
[2.5]
Similarity(D
f
,Q)=
Q
D
f
[2.6]
Figure 2.3. Elements of measure of spatial similarity
Theworkrelativetothemeasureoftemporalsimilarityislessdiverse.Itismainly
based on the notions of inclusion and overlapping between timestamps, as described
in [ALL 84], and usually provides Boolean results for those involved in the systems
listed in Table 2.1.
However, Teissèdre et al. [TEI 11] propose a temporal relevancy calculation
heuristic with the double objective of (1) ranking according to relevance the results
of a retrieval and (2) integrating the documents that are non-relevant in the sense of
Allen but sufficiently close to the search period to possibly interest the author of the
query. Thus, the criteria used in the calculation of temporal relevance as proposed
in [TEI 11] integrate:
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