DATABASE SYSTEM CONCEPTS LCPO
7th Edition
ISBN: 9781265586577
Author: SILBERSCHATZ
Publisher: MCG
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Expert Solution & Answer
Chapter 15, Problem 13PE
Explanation of Solution
Initially, make the list L empty;
for (each keyword c in set of keywords S) do begin
let D := the list of documents identifiers related to current c;
for (each document identifier d in the list D) do
if (a record R with d as document identifier is on the list L) then
R.reference_count := R.reference_count + 1;
else begin
make a new record R;
R.document_id := d;
R.reference_count := 1;
Add record R to list L;
end;
end;
for(each record R in list L) do
if (R.reference_count >= k) then
display R;
Explanation:
- Here, consider “S” is the set of “n” keywords and “L” is the required list. This list is initially empty.
- First “for each” document identifier calculate its reference count...
Expert Solution & Answer
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