Recommendation Model Based on Semantic Features and a Knowledge Graph

Algorithm 2

Calculate the extended word set of source features.

Input: - source feature entity set of items

Output: - extended words set

1:

2: if then output

3: for to

4: According to the Type attribute of the resource page in DBpedia, the extended word set of is . And .

5: Calculate between and according to formula (1), and determine the extended word set for according to a given threshold, and .

6: end for

7: return