PICOC Criteria to define scope, goals, and strings.

Table 1: PICOC Criteria to define scope, goals, and strings.

Criteria	Describe/Reflect
Population	Web services, Web services discovery, Web services recommendations
Intervention	Clustering, Association rules
Comparison	Comparison of methods, Algorithms, Datasets, and Evolution metrics
Outcome	Classification and comparison, Trends and future research directions
Context	Systematic investigation to consolidate peer-reviewed and academic research