Review Article
A Tool-Based Perspective on Software Code Maintainability Metrics: A Systematic Literature Review
Table 2
Search strings for the selected digital libraries.
| Library | Before refinement | After refinement |
| ACM Digital Library | +(“software” “code”)+(metrics)+(maintainability) | +(“software” “code”)+(metrics)+(maintainability)-(defect)-(fault)-(co-change)-(policy-driven) | IEEE Xplore | (((code OR software) AND metrics) AND maintainability) | ((((((((code OR software) AND metrics) AND maintainability) NOT defect) NOT fault) NOT co-change) NOT policy-driven) NOT design) | Scopus | (code OR software) AND metrics AND maintainability | code OR software AND metrics AND maintainability AND NOT fault AND NOT defect AND NOT co-change AND NOT policy-driven AND NOT design | Web of Science | (code OR software) AND metrics AND maintainability | code OR software AND metrics AND maintainability NOT fault NOT defect NOT co-change NOT policy-driven NOT design |
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