Table 6: Data extraction form.
| # | Data Extraction Category | Description | Purpose |
| Study General Description | |||
| 1 | Identifier | Identifier number (DOI) | |
| 2 | Date | Data extraction date | |
| Study Description | |||
| 1 | Title | Title of study | |
| 2 | Author Name | Name of study authors | |
| 3 | Country | Country of study publication (first author) | |
| 4 | Publication Year | Publication year | |
| 5 | Type | Conference proceedings, Journal article | |
| 6 | Venue | Name of conference or Journal | |
| 7 | Author Affiliation(s) | Affiliation of author(s) (first author) | Study Content |
| 1 | Objectives | Objectives of study | |
| 2 | Method | Method to support objectives | RQ1 |
| 3 | Techniques | Clustering-discovery, Clustering-recommendation, Association rules-discovery, Association rules-recommendation, or Combined | RQ1 |
| 4 | Algorithm | Name of algorithm in study | RQ1 |
| 5 | Evaluation Metric | Name of evaluation metric | RQ1 |
| 6 | Metric Purpose | Evaluation metric purpose | RQ1 |
| 7 | Dataset | Name of dataset for validation | RQ2 |
| 8 | WS in Dataset | Number of WS in dataset | RQ2 |
| 9 | Senvs. Syn Dataset | Semantic or syntax datasets | RQ2 |
| 10 | Dataset Purpose | Recommendation or discovery | RQ2 |
| 11 | Future Direction | Future direction | RQ3 |
| 12 | Limitations | Restriction of the work | RQ3 |
| 13 | Challenges | What challenges in this study are associated with Web services discovery and recommendations? | |