Methods, systems, and computer program products for linkage prediction through similarity analysis are provided herein. A computer-implemented method includes extracting multiple features from (i) one or more attributes of a set of source nodes within a knowledge graph and (ii) one or more attributes of a set of target nodes within the knowledge graph, wherein at least one extracted feature satisfies a designated complexity level; performing a similarity analysis across the at least one extracted feature by applying one or more similarity measures to the at least one extracted feature; predicting one or more sets of links between the source nodes and the target nodes based on the similarity analysis, wherein one or more sets of predicted links satisfy a pre-determined accuracy threshold; and outputting the one or more sets of predicted links to a user.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. A computer-implemented method, comprising: extracting multiple features from (i) one or more attributes of a set of source nodes within a knowledge graph and (ii) one or more attributes of a set of target nodes within the knowledge graph, wherein at least one extracted feature satisfies a designated complexity level; performing a similarity analysis across the at least one extracted feature by applying one or more similarity measures to the at least one extracted feature; predicting one or more sets of links between the source nodes and the target nodes based on the similarity analysis, wherein one or more sets of predicted links satisfy a pre-determined accuracy threshold; and outputting the one or more sets of predicted links to a user. 2. The computer-implemented method of claim 1, comprising: transforming a collection of raw data; and integrating the transformed data into the knowledge graph. 3. The computer-implemented method of claim 1, comprising: identifying a source entity node type, a target entity node type, and a relationship type. 4. The computer-implemented method of claim 1, comprising: setting a complexity level to a value upon a determination that the one or more predicted links do not satisfy the pre-determined accuracy threshold. 5. The computer-implemented method of claim 1, comprising: generating a rationale for the one or more sets of predicted links, wherein the rationale comprises identification of one or more similar node pairs. 6. The computer-implemented method of claim 6, comprising: outputting a generated rationale to the user. 7. The computer-implemented method of claim 1, comprising: generating a ranking of the extracted features. 8. The computer-implemented method of claim 8, comprising: outputting the ranking of the extracted features to the user. 9. The computer-implemented method of claim 1, wherein said extracting further comprises extracting the multiple features from one or more attributes of one or more nodes neighboring the set of source nodes within the knowledge graph. 10. The computer-implemented method of claim 1, wherein said extracting further comprises extracting the multiple features from one or more attributes of one or more nodes neighboring the set of target nodes within the knowledge graph. 11. The computer-implemented method of claim 1, wherein said extracting further comprises extracting the multiple features from one or more relationships between nodes within the knowledge graph. 12. The computer-implemented method of claim 1, wherein the one or more similarity measures comprise one or more data-type based measures. 13. The computer-implemented method of claim 1, wherein the one or more similarity measures comprise one or more graph-based relational similarity measures. 14. The computer-implemented method of claim 1, comprising: generating a similarity matrix comprising similarity scores between the set of source nodes and the set of target nodes based on said similarity analysis. 15. The computer-implemented method of claim 1, wherein software is provided as a service in a cloud environment. 16. A computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a device to cause the device to: extract multiple features from (i) one or more attributes of a set of source nodes within a knowledge graph and (ii) one or more attributes of a set of target nodes within the knowledge graph, wherein at least one extracted feature satisfies a designated complexity level; perform a similarity analysis across the at least one extracted feature by applying one or more similarity measures to the at least one extracted feature; predict one or more sets of links between the source nodes and the target nodes based on the similarity analysis, wherein one or more sets of predicted links satisfy a pre-determined accuracy threshold; and output the one or more sets of predicted links to a user. 17. The computer program product of claim 16, wherein the program instructions executable by a computing device further cause the computing device to: transform a collection of raw data; and integrate the transformed data into the knowledge graph. 18. A system comprising: a memory; and at least one processor coupled to the memory and configured for: extracting multiple features from (i) one or more attributes of a set of source nodes within a knowledge graph and (ii) one or more attributes of a set of target nodes within the knowledge graph, wherein at least one extracted feature satisfies a designated complexity level; performing a similarity analysis across the at least one extracted feature by applying one or more similarity measures to the at least one extracted feature; predicting one or more sets of links between the source nodes and the target nodes based on the similarity analysis, wherein one or more sets of predicted links satisfy a pre-determined accuracy threshold; and outputting the one or more sets of predicted links to a user. 19. The system of claim 18, wherein the at least one processor is further configured for: transforming a collection of raw data; and integrating the transformed data into the knowledge graph. 20. The system of claim 18, wherein software is provided as a service in a cloud environment.